Method for resetting a fuse of a surgical instrument shaft

ABSTRACT

Methods for resetting a fuse in a surgical instrument are disclosed.

CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation patent application claiming priority under 35 U.S.C. § 120 to U.S. patent application Ser. No. 15/385,896, entitled METHOD FOR RESETTING A FUSE OF A SURGICAL INSTRUMENT SHAFT, filed Dec. 21, 2016, now U.S. Patent Application Publication No. 2018/0168597, the entire disclosure of which is hereby incorporated by reference herein.

BACKGROUND

The present invention relates to surgical instruments and, in various arrangements, to surgical stapling and cutting instruments and staple cartridges for use therewith that are designed to staple and cut tissue.

BRIEF DESCRIPTION OF THE DRAWINGS

Various features of the embodiments described herein, together with advantages thereof, may be understood in accordance with the following description taken in conjunction with the accompanying drawings as follows:

FIG. 1 is a perspective view of a surgical instrument including a handle and an interchangeable shaft assembly comprising an end effector in accordance with at least one embodiment;

FIG. 1A is a perspective view of the surgical instrument of FIG. 1 illustrated with some components removed;

FIG. 1B is a perspective view of a distal portion of the surgical instrument of FIG. 1 illustrated with some components removed;

FIG. 1C is a perspective view of a proximal portion of the surgical instrument of FIG. 1 illustrated with some components removed;

FIG. 1D is an exploded view of the surgical instrument of FIG. 1 ;

FIG. 1E is an exploded view of the distal end of the surgical instrument of FIG. 1 ;

FIG. 1F is an exploded view of the proximal end of the surgical instrument of FIG. 1 ;

FIG. 1G is a partial cross-sectional plan view of the surgical instrument of FIG. 1 illustrating the end effector in an unarticulated configuration;

FIG. 1H is a partial cross-sectional plan view of the surgical instrument of FIG. 1 illustrating the end effector in an articulated configuration;

FIG. 1I is a partial exploded view of the surgical instrument of FIG. 1 ;

FIG. 1J is a cross-sectional view of an anvil jaw of the surgical instrument of FIG. 1 ;

FIG. 2 is an elevational view of a cartridge jaw in accordance with at least one embodiment;

FIG. 3 is an elevational view of an end effector including the anvil jaw of FIG. 1 and the cartridge jaw of FIG. 2 ;

FIG. 4 is a partial elevational view of an end effector in accordance with at least one embodiment illustrated in an open configuration;

FIG. 5 is a partial elevational view of the end effector of FIG. 4 illustrated in a fully-closed configuration;

FIG. 6 is a partial perspective view of a firing assembly in accordance with at least one embodiment;

FIG. 7 is a partial cross-sectional view of a surgical instrument including the firing assembly of FIG. 6 ;

FIG. 8 is a partial cross-sectional view of the surgical instrument of FIG. 7 illustrated in a partially-opened configuration;

FIG. 9 is a perspective view of a coupling member of a firing member in accordance with at least one embodiment;

FIG. 10 is a partial perspective view of the firing member of FIG. 9 including a layered firing bar attached to the coupling member;

FIG. 11 is an end view of the firing member of FIG. 9 ;

FIG. 12 is a perspective view of a coupling member of a firing member in accordance with at least one embodiment;

FIG. 13 is a partial perspective view of a firing bar of the firing member of FIG. 12 ;

FIG. 14 is a partial perspective view of the firing member of FIG. 12 ;

FIG. 15 is a partial perspective view of a coupling member and a firing bar layer of a firing member in accordance with at least one embodiment;

FIG. 16 is a partial perspective view of the firing bar layer attached to the coupling member of FIG. 15 ;

FIG. 17 is a partial perspective view of additional layers of the firing bar attached to the coupling member of FIG. 15 ;

FIG. 18 is a partial plan view of the coupling member and the firing bar of FIG. 15 ;

FIG. 19 is a partial perspective view of a firing assembly comprising a coupling member, a firing bar, and a lockout bar in accordance with at least one embodiment;

FIG. 20 is a partial cross-sectional view of a surgical instrument including the firing assembly of FIG. 19 illustrated in a locked out configuration;

FIG. 21 is a partial cross-sectional view of the surgical instrument of FIG. 20 illustrated in an unlocked configuration;

FIG. 22 is a partial cross-sectional view of a surgical instrument illustrated in a locked out configuration;

FIG. 23 is a partial cross-sectional view of the surgical instrument of FIG. 22 illustrated in an unlocked configuration;

FIG. 24 is a partial cross-sectional view of a surgical instrument illustrated in a locked out configuration;

FIG. 25 is a partial cross-sectional view of the surgical instrument of FIG. 24 illustrated in an unlocked configuration;

FIG. 26 is an exploded view of a cartridge jaw, a staple cartridge, and a firing member of a surgical instrument in accordance with at least one embodiment;

FIG. 27 is an elevational view of the surgical instrument of FIG. 26 illustrated in an unfired configuration;

FIG. 28 is an elevational view of the surgical instrument of FIG. 26 illustrated in a partially-fired configuration;

FIG. 29 is an elevational view of the surgical instrument of FIG. 26 illustrated in a fully-fired configuration;

FIG. 30 illustrates the surgical instrument of FIG. 26 clamped onto a vessel;

FIG. 31 is a top plan view of a cartridge jaw in accordance with at least one embodiment;

FIG. 32 is a bottom plan view of the cartridge jaw of FIG. 31 ;

FIG. 33 is a cross-sectional view of the cartridge jaw of FIG. 31 taken along line 33-33 in FIG. 31 ;

FIG. 34 is a cross-sectional view of the cartridge jaw of FIG. 31 taken along line 34-34 in FIG. 31 ;

FIG. 35 is a partial cross-sectional view of a surgical instrument comprising a firing assembly including a firing force lockout illustrated in an unlocked condition;

FIG. 36 is a partial cross-sectional view of the surgical instrument of FIG. 35 illustrating the firing force lockout in a locked configuration;

FIG. 37 is a partial cross-sectional view of the surgical instrument of FIG. 35 illustrating the firing force lockout in an unlocked configuration and the firing assembly in a fired position;

FIG. 38 is a cross-sectional view of the surgical instrument of FIG. 35 taken along line 38-38 in FIG. 37 ;

FIG. 39 is a partial plan view of a staple cartridge comprising a cartridge lockout in accordance with at least one embodiment;

FIG. 40 is a partial plan view of the staple cartridge of FIG. 39 illustrating a firing member partially advanced through the staple cartridge;

FIG. 41 is a partial cross-sectional elevational view of the staple cartridge of FIG. 39 illustrating the firing member in a partially-advanced position;

FIG. 42 is a partial plan view of the staple cartridge of FIG. 39 illustrating the firing member in a retracted position and the cartridge lockout in a locked configuration;

FIG. 43 is a partial perspective view of a firing lockout assembly of a surgical instrument illustrated in an unlocked configuration in accordance with at least one embodiment;

FIG. 44 is a partial cross-sectional perspective view of the firing lockout assembly of FIG. 43 illustrated in its unlocked configuration;

FIG. 45 is a partial cross-sectional elevational view of the surgical instrument of FIG. 43 illustrating the firing lockout in its unlocked configuration;

FIG. 46 is a partial cross-sectional elevational view of the surgical instrument of FIG. 43 illustrating the firing lockout in a locked configuration;

FIG. 47 is a partial cross-sectional elevational view of the surgical instrument of FIG. 43 illustrating the firing lockout being returned to its unlocked configuration;

FIG. 48 is a partial perspective view of a surgical instrument comprising a firing lockout in accordance with at least one embodiment;

FIG. 49 is a partial cross-sectional view of the surgical instrument of FIG. 48 illustrating the firing lockout in an unlocked configuration;

FIG. 50 is a partial cross-sectional view of the surgical instrument of FIG. 48 illustrating the firing lockout in a locked configuration;

FIG. 51 is a partial cross-sectional view of the surgical instrument of FIG. 48 illustrating the firing lockout after it has been returned to its unlocked configuration;

FIG. 52 is a partial cross-sectional view of a surgical instrument comprising a firing member and a firing force lockout in accordance with at least one embodiment;

FIG. 53 is a partial cross-sectional view of the surgical instrument of FIG. 52 illustrating the firing member moved distally;

FIG. 54 is an end cross-sectional view of the surgical instrument of FIG. 52 taken along line 54-54 in FIG. 52 ;

FIG. 55 is a partial cross-sectional view of the surgical instrument of FIG. 52 illustrating the firing member in a fired position;

FIG. 56 is a partial cross-sectional view of the surgical instrument of FIG. 52 illustrating the firing force lockout in a locked condition;

FIG. 57 is a partial cross-sectional view of a surgical instrument comprising a firing member and a firing force lockout in accordance with at least one embodiment;

FIG. 58 is a partial cross-sectional view of the surgical instrument of FIG. 57 illustrating the firing force lockout in a locked condition;

FIG. 59 is a partial cross-sectional view of the surgical instrument of FIG. 57 illustrating the firing force lockout after it has been reset and the firing member advanced distally to perform a staple firing stroke;

FIG. 60 is a partial exploded view of a firing assembly of a surgical instrument in accordance with at least one embodiment;

FIG. 61 is a detail view of a fuse region of the firing assembly of FIG. 60 configured to fail when the firing load transmitted through the firing assembly exceeds a threshold;

FIG. 62 is a partial cross-sectional view of the surgical instrument of FIG. 60 illustrating the firing assembly in an unfired position and the fuse region in an intact state;

FIG. 63 is a partial cross-sectional view of the surgical instrument of FIG. 60 illustrating the fuse region in a failed state;

FIG. 64 is a partial cross-sectional view of the surgical instrument of FIG. 60 illustrating the firing assembly in a collapsed state;

FIG. 65 is a partial cross-sectional view of a surgical instrument comprising a firing assembly having a resettable fuse portion in accordance with at least one embodiment;

FIG. 66 is a partial cross-sectional view of the surgical instrument of FIG. 65 illustrating the firing assembly in a fired position;

FIG. 67 is a partial cross-sectional view of the surgical instrument of FIG. 65 illustrating the fuse portion in a failed state;

FIG. 68 is a partial cross-sectional view of the surgical instrument of FIG. 65 illustrating the fuse portion being retracted and reset;

FIG. 69 is a partial cross-sectional view of the surgical instrument of FIG. 65 illustrating the fuse portion in a reset state;

FIG. 70 is a partial cross-sectional view of the surgical instrument of FIG. 65 illustrating the firing assembly in a fired position;

FIG. 71 is a partial cross-sectional view of a surgical instrument comprising a firing assembly having a fuse portion in accordance with at least one embodiment;

FIG. 72 is a partial cross-sectional view of the surgical instrument of FIG. 71 illustrating the firing assembly in a fired position;

FIG. 73 is a partial cross-sectional view of the surgical instrument of FIG. 71 illustrating the fuse portion in a failed state prior to the firing assembly being advanced distally to perform a staple firing stroke, wherein the fuse portion is also acting as a firing force lockout preventing the staple firing stroke;

FIG. 74 is a partial cross-sectional view of the surgical instrument of FIG. 71 illustrating the fuse portion in a first-stage failed state during the staple firing stroke of the firing assembly;

FIG. 75 is a partial cross-sectional view of the surgical instrument of FIG. 71 illustrating the fuse portion in a second-stage failed state during the staple firing stroke of the firing assembly;

FIG. 76 is a partial cross-sectional view of the surgical instrument of FIG. 71 illustrating the firing assembly being reset;

FIG. 77 is a partial cross-sectional view of the surgical instrument of FIG. 71 illustrating the firing assembly in a reset state;

FIG. 77A is a perspective view of a staple cartridge in accordance with at least one embodiment;

FIG. 77B is a partial plan view of the staple cartridge of FIG. 77A and an anvil for use therewith;

FIG. 77C is a perspective view of a staple cartridge in accordance with at least one embodiment;

FIG. 77D is a partial plan view of the staple cartridge of FIG. 77C and an anvil for use therewith;

FIG. 77E comprises elevational views of the staples of the staple cartridge of FIG. 77C in an unformed configuration, elevational views of the staples of the staple cartridge of FIG. 77C in a formed configuration, and plan views of the staples of the staple cartridge of FIG. 77C in an unformed configuration;

FIG. 77F illustrates the staples of FIG. 77E implanted into the tissue of a patient;

FIG. 78 is a perspective view of a surgical instrument including a handle and an interchangeable shaft assembly in accordance with at least one embodiment;

FIG. 79 is a perspective view of a robotic surgical system operably supporting a plurality of surgical tools in accordance with at least one embodiment;

FIG. 80 is a plan view of an anvil of a surgical stapling system comprising a plurality of staple forming pockets;

FIG. 81 is a plan view of a staple forming pocket arrangement of the anvil of FIG. 80 , wherein the forming pocket arrangement is configured to accommodate and deform two different types of staples;

FIG. 82 is a cross-sectional perspective view of the staple forming pocket arrangement of FIG. 81 ;

FIG. 83 is a plan view of the anvil of FIG. 80 and a first staple cartridge configured to be used therewith;

FIG. 84 is a plan view of the anvil of FIG. 80 and a second staple cartridge configured to be used therewith;

FIG. 85 is an elevational view of a first staple of the first staple cartridge of FIG. 83 in an unformed configuration, an elevational view of the first staple in a formed configuration, and a plan view of the first staple in the formed configuration;

FIG. 86 is an elevational view of a second staple of the second staple cartridge of FIG. 84 in an unformed configuration, an elevational view of the second staple in a formed configuration, and a plan view of the second staple in the formed configuration;

FIG. 87 is a cross-sectional perspective view of a forming pocket arrangement comprising a proximal forming pocket and a distal forming pocket, wherein the forming pocket arrangement is configured to accommodate and deform two different types of staples;

FIG. 88 is a plan view of the forming pocket arrangement of FIG. 87 , wherein each pocket comprises a first groove and a second groove;

FIG. 89 is a cross-sectional view of the forming pocket arrangement of FIG. 87 taken along line 89-89 in FIG. 88 ;

FIG. 90 is a cross-sectional view of the forming pocket arrangement of FIG. 87 taken along line 90-90 in FIG. 88 ;

FIG. 91 is a cross-sectional view of the forming pocket arrangement of FIG. 87 taken along line 91-91 in FIG. 88 ;

FIG. 92 is a cross-sectional view of the forming pocket arrangement of FIG. 87 taken along line 92-92 in FIG. 88 ;

FIG. 93 is a cross-sectional view of the forming pocket arrangement of FIG. 87 and a first staple and a second staple configured to be formed therewith;

FIG. 94 is an elevational view of the first staple of FIG. 93 in a formed configuration;

FIG. 95 is an elevational view of the second staple of FIG. 93 in a formed configuration;

FIG. 96 is an elevational view of two different size staples configured to be formed with the same forming pocket arrangement experiencing longitudinal deflection;

FIG. 97 is a cross-sectional perspective view of a laminated forming pocket arrangement comprised of horizontal laminates;

FIG. 98 is a transverse, cross-sectional view of the laminated forming pocket arrangement of FIG. 97 ;

FIG. 99 is an axial, cross-sectional view of the laminated forming pocket arrangement of FIG. 97 ;

FIG. 100 is a plan view of the laminated forming pocket arrangement of FIG. 97 ;

FIG. 101 is a transverse, cross-sectional view of a laminated forming pocket arrangement comprised of vertical laminates;

FIG. 102 is an elevational view of a staple comprising laterally-facing staple tip faces;

FIG. 103 is an elevational view of a surgical staple cartridge comprising a driver comprising a sloped, staple delivery surface;

FIG. 104 is an elevational view of the surgical staple cartridge of FIG. 103 and an anvil;

FIG. 105 is a cross-sectional, elevational view of a surgical stapling system comprising an anvil, a staple cartridge, and a staple comprising asymmetric staple legs;

FIG. 106 is a cross-sectional, elevational view of a surgical stapling system comprising a staple cartridge, a staple, and an anvil comprising a cambered forming pocket arrangement;

FIG. 107 is a plan view of an anvil comprising a plurality of forming pocket arrangements, wherein each forming pocket arrangement comprises an asymmetric pocket pair;

FIG. 108 is a cross-sectional view of the anvil of FIG. 107 taken along line 108-108 on FIG. 107 ;

FIG. 109 is a cross-sectional view of an anvil comprising a plurality of forming pocket arrangements, wherein each forming pocket arrangement comprises an asymmetric pocket pair, and wherein each forming pocket arrangement is individually angled with respect to a datum plane;

FIG. 110 is a plan view of an anvil comprising a plurality of forming pocket arrangements, wherein each forming pocket arrangement is configured to accommodate two different types of staples;

FIG. 111 is a cross-sectional view of the anvil of FIG. 110 , wherein each forming pocket arrangement is individually angled with respect to a datum plane;

FIG. 112 is a cross-sectional view of an anvil comprising a plurality of forming pocket arrangements, wherein the forming pocket arrangements are individually angled with respect to a datum plane, and wherein the angle progressively increases toward the distal end of the anvil;

FIG. 113 is a cross-sectional, elevational view of a surgical stapling system comprising the forming pocket arrangement of FIG. 81 , a first staple comprising a first staple tip comprising a first angled configuration, and a second staple comprising a second staple tip comprising a second angled configuration;

FIG. 114 is a side view of a first staple, a side view of a second staple comprising a staple base and a staple leg angled with respect to the staple base, and a side view of a third staple comprising a staple base, a staple leg, and a staple tip angled with respect to the staple base and the staple leg;

FIG. 115 is a cross-sectional, elevational view of a surgical stapling system comprising the second staple of FIG. 114 ;

FIG. 116 is a cross-sectional, elevational view of a surgical stapling system comprising the first staple of FIG. 114 illustrated in phantom lines and the third staple of FIG. 114 illustrated in solid lines;

FIG. 117 is a perspective view of a surgical staple cartridge;

FIG. 118 is a plan view of the staple cartridge of FIG. 117 and an anvil configured to be used therewith;

FIG. 119 is a partial perspective view of a surgical staple cartridge comprising a first side cavity and a second side cavity;

FIG. 120 is a plan view of the staple cartridge of FIG. 119 and an anvil configured to be used therewith;

FIG. 121 is a plan view comparison of the anvil of FIG. 118 and the anvil of FIG. 120 ;

FIG. 122 is a perspective view of a surgical staple comprising four longitudinally and laterally offset staple legs;

FIG. 123 is a perspective view of a surgical staple comprising four laterally offset staple legs;

FIG. 124 is a perspective view of a surgical staple comprising four longitudinally and laterally offset staple legs;

FIG. 125 is a plan view of the surgical staple of FIG. 124 ;

FIG. 126 is a side view of the surgical staple of FIG. 124 ;

FIG. 127 is an elevational view of the surgical staple of FIG. 124 ; and

FIG. 128 is an elevational view of a surgical staple comprising four longitudinally and laterally offset staple legs, wherein the staple legs comprise laterally-facing staple tip faces which face different directions.

Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate various embodiments of the invention, in one form, and such exemplifications are not to be construed as limiting the scope of the invention in any manner.

DETAILED DESCRIPTION

Applicant of the present application owns the following U.S. Patent Applications that were filed on Dec. 21, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. patent application Ser. No. 15/386,185, entitled SURGICAL         STAPLING INSTRUMENTS AND REPLACEABLE TOOL ASSEMBLIES THEREOF,         now U.S. Pat. No. 10,639,035;     -   U.S. patent application Ser. No. 15/386,230, entitled         ARTICULATABLE SURGICAL STAPLING INSTRUMENTS, now U.S. Patent         Application Publication No. 2018/0168649;     -   U.S. patent application Ser. No. 15/386,221, entitled LOCKOUT         ARRANGEMENTS FOR SURGICAL END EFFECTORS, now U.S. Pat. No.         10,835,247;     -   U.S. patent application Ser. No. 15/386,209, entitled SURGICAL         END EFFECTORS AND FIRING MEMBERS THEREOF, now U.S. Pat. No.         10,588,632;     -   U.S. patent application Ser. No. 15/386,198, entitled LOCKOUT         ARRANGEMENTS FOR SURGICAL END EFFECTORS AND REPLACEABLE TOOL         ASSEMBLIES, now U.S. Pat. No. 10,610,224; and     -   U.S. patent application Ser. No. 15/386,240, entitled SURGICAL         END EFFECTORS AND ADAPTABLE FIRING MEMBERS THEREFOR, now U.S.         Patent Application Publication No. 2018/0168651.

Applicant of the present application owns the following U.S. Patent Applications that were filed on Dec. 21, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. patent application Ser. No. 15/385,939, entitled STAPLE         CARTRIDGES AND ARRANGEMENTS OF STAPLES AND STAPLE CAVITIES         THEREIN, now U.S. Pat. No. 10,835,246;     -   U.S. patent application Ser. No. 15/385,941, entitled SURGICAL         TOOL ASSEMBLIES WITH CLUTCHING ARRANGEMENTS FOR SHIFTING BETWEEN         CLOSURE SYSTEMS WITH CLOSURE STROKE REDUCTION FEATURES AND         ARTICULATION AND FIRING SYSTEMS, now U.S. Pat. No. 10,736,629;     -   U.S. patent application Ser. No. 15/385,943, entitled SURGICAL         STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS, now U.S. Pat.         No. 10,667,811;     -   U.S. patent application Ser. No. 15/385,950, entitled SURGICAL         TOOL ASSEMBLIES WITH CLOSURE STROKE REDUCTION FEATURES, now U.S.         Pat. No. 10,588,630;     -   U.S. patent application Ser. No. 15/385,945, entitled STAPLE         CARTRIDGES AND ARRANGEMENTS OF STAPLES AND STAPLE CAVITIES         THEREIN, now U.S. Pat. No. 10,893,864;     -   U.S. patent application Ser. No. 15/385,946, entitled SURGICAL         STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS, now U.S. Patent         Application Publication No. 2018/0168633;     -   U.S. patent application Ser. No. 15/385,951, entitled SURGICAL         INSTRUMENTS WITH JAW OPENING FEATURES FOR INCREASING A JAW         OPENING DISTANCE, now U.S. Pat. No. 10,568,626;     -   U.S. patent application Ser. No. 15/385,953, entitled METHODS OF         STAPLING TISSUE, now U.S. Pat. No. 10,675,026;     -   U.S. patent application Ser. No. 15/385,954, entitled FIRING         MEMBERS WITH NON-PARALLEL JAW ENGAGEMENT FEATURES FOR SURGICAL         END EFFECTORS, now U.S. Pat. No. 10,624,635;     -   U.S. patent application Ser. No. 15/385,955, entitled SURGICAL         END EFFECTORS WITH EXPANDABLE TISSUE STOP ARRANGEMENTS, now U.S.         Pat. No. 10,813,638;     -   U.S. patent application Ser. No. 15/385,948, entitled SURGICAL         STAPLING INSTRUMENTS AND STAPLE-FORMING ANVILS, now U.S. Patent         Application Publication No. 2018/0168584;     -   U.S. patent application Ser. No. 15/385,956, entitled SURGICAL         INSTRUMENTS WITH POSITIVE JAW OPENING FEATURES, now U.S. Pat.         No. 10,588,631;     -   U.S. patent application Ser. No. 15/385,958, entitled SURGICAL         INSTRUMENTS WITH LOCKOUT ARRANGEMENTS FOR PREVENTING FIRING         SYSTEM ACTUATION UNLESS AN UNSPENT STAPLE CARTRIDGE IS PRESENT,         now U.S. Pat. No. 10,639,034; and     -   U.S. patent application Ser. No. 15/385,947, entitled STAPLE         CARTRIDGES AND ARRANGEMENTS OF STAPLES AND STAPLE CAVITIES         THEREIN, now U.S. Pat. No. 10,568,625.

Applicant of the present application owns the following U.S. Patent Applications that were filed on Dec. 21, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. patent application Ser. No. 15/385,898, entitled STAPLE         FORMING POCKET ARRANGEMENT TO ACCOMMODATE DIFFERENT TYPES OF         STAPLES, now U.S. Pat. No. 10,537,325;     -   U.S. patent application Ser. No. 15/385,899, entitled SURGICAL         INSTRUMENT COMPRISING IMPROVED JAW CONTROL, now U.S. Pat. No.         10,758,229;     -   U.S. patent application Ser. No. 15/385,901, entitled STAPLE         CARTRIDGE AND STAPLE CARTRIDGE CHANNEL COMPRISING WINDOWS         DEFINED THEREIN, now U.S. Pat. No. 10,667,809;     -   U.S. patent application Ser. No. 15/385,902, entitled SURGICAL         INSTRUMENT COMPRISING A CUTTING MEMBER, now U.S. Pat. No.         10,888,322;     -   U.S. patent application Ser. No. 15/385,904, entitled STAPLE         FIRING MEMBER COMPRISING A MISSING CARTRIDGE AND/OR SPENT         CARTRIDGE LOCKOUT, now U.S. Pat. No. 10,881,401;     -   U.S. patent application Ser. No. 15/385,905, entitled FIRING         ASSEMBLY COMPRISING A LOCKOUT, now U.S. Pat. No. 10,695,055;     -   U.S. patent application Ser. No. 15/385,907, entitled SURGICAL         INSTRUMENT SYSTEM COMPRISING AN END EFFECTOR LOCKOUT AND A         FIRING ASSEMBLY LOCKOUT, now U.S. Patent Application Publication         No. 2018/0168608;     -   U.S. patent application Ser. No. 15/385,908, entitled FIRING         ASSEMBLY COMPRISING A FUSE, now U.S. Patent Application         Publication No. 2018/0168609; and     -   U.S. patent application Ser. No. 15/385,909, entitled FIRING         ASSEMBLY COMPRISING A MULTIPLE FAILED-STATE FUSE, now U.S.         Patent Application Publication No. 2018/0168610.

Applicant of the present application owns the following U.S. Patent Applications that were filed on Dec. 21, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. patent application Ser. No. 15/385,920, entitled STAPLE         FORMING POCKET ARRANGEMENTS, now U.S. Pat. No. 10,499,914;     -   U.S. patent application Ser. No. 15/385,913, entitled ANVIL         ARRANGEMENTS FOR SURGICAL STAPLERS, now U.S. Patent Application         Publication No. 2018/0168614;     -   U.S. patent application Ser. No. 15/385,914, entitled METHOD OF         DEFORMING STAPLES FROM TWO DIFFERENT TYPES OF STAPLE CARTRIDGES         WITH THE SAME SURGICAL STAPLING INSTRUMENT, now U.S. Patent         Application Publication No. 2018/0168615;     -   U.S. patent application Ser. No. 15/385,893, entitled         BILATERALLY ASYMMETRIC STAPLE FORMING POCKET PAIRS, now U.S.         Pat. No. 10,682,138;     -   U.S. patent application Ser. No. 15/385,929, entitled CLOSURE         MEMBERS WITH CAM SURFACE ARRANGEMENTS FOR SURGICAL INSTRUMENTS         WITH SEPARATE AND DISTINCT CLOSURE AND FIRING SYSTEMS, now U.S.         Pat. No. 10,667,810;     -   U.S. patent application Ser. No. 15/385,911, entitled SURGICAL         STAPLERS WITH INDEPENDENTLY ACTUATABLE CLOSING AND FIRING         SYSTEMS, now U.S. Pat. No. 10,448,950;     -   U.S. patent application Ser. No. 15/385,927, entitled SURGICAL         STAPLING INSTRUMENTS WITH SMART STAPLE CARTRIDGES, now U.S.         Patent Application Publication No. 2018/0168625;     -   U.S. patent application Ser. No. 15/385,917, entitled STAPLE         CARTRIDGE COMPRISING STAPLES WITH DIFFERENT CLAMPING BREADTHS,         now U.S. Patent Application Publication No. 2018/0168617;     -   U.S. patent application Ser. No. 15/385,900, entitled STAPLE         FORMING POCKET ARRANGEMENTS COMPRISING PRIMARY SIDEWALLS AND         POCKET SIDEWALLS, now U.S. Pat. No. 10,898,186;     -   U.S. patent application Ser. No. 15/385,931, entitled         NO-CARTRIDGE AND SPENT CARTRIDGE LOCKOUT ARRANGEMENTS FOR         SURGICAL STAPLERS, now U.S. Patent Application Publication No.         2018/0168627;     -   U.S. patent application Ser. No. 15/385,915, entitled FIRING         MEMBER PIN ANGLE, now U.S. Pat. No. 10,779,823;     -   U.S. patent application Ser. No. 15/385,897, entitled STAPLE         FORMING POCKET ARRANGEMENTS COMPRISING ZONED FORMING SURFACE         GROOVES, now U.S. Patent Application Publication No.         2018/0168598;     -   U.S. patent application Ser. No. 15/385,922, entitled SURGICAL         INSTRUMENT WITH MULTIPLE FAILURE RESPONSE MODES, now U.S. Pat.         No. 10,426,471;     -   U.S. patent application Ser. No. 15/385,924, entitled SURGICAL         INSTRUMENT WITH PRIMARY AND SAFETY PROCESSORS, now U.S. Pat. No.         10,758,230;     -   U.S. patent application Ser. No. 15/385,912, entitled SURGICAL         INSTRUMENTS WITH JAWS THAT ARE PIVOTABLE ABOUT A FIXED AXIS AND         INCLUDE SEPARATE AND DISTINCT CLOSURE AND FIRING SYSTEMS, now         U.S. Pat. No. 10,568,624;     -   U.S. patent application Ser. No. 15/385,910, entitled ANVIL         HAVING A KNIFE SLOT WIDTH, now U.S. Pat. No. 10,485,543;     -   U.S. patent application Ser. No. 15/385,903, entitled CLOSURE         MEMBER ARRANGEMENTS FOR SURGICAL INSTRUMENTS, now U.S. Pat. No.         10,617,414; and     -   U.S. patent application Ser. No. 15/385,906, entitled FIRING         MEMBER PIN CONFIGURATIONS, now U.S. Pat. No. 10,856,868.

Applicant of the present application owns the following U.S. Patent Applications that were filed on Dec. 21, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. patent application Ser. No. 15/386,188, entitled STEPPED         STAPLE CARTRIDGE WITH ASYMMETRICAL STAPLES, now U.S. Pat. No.         10,537,324;     -   U.S. patent application Ser. No. 15/386,192, entitled STEPPED         STAPLE CARTRIDGE WITH TISSUE RETENTION AND GAP SETTING FEATURES,         now U.S. Pat. No. 10,687,810;     -   U.S. patent application Ser. No. 15/386,206, entitled STAPLE         CARTRIDGE WITH DEFORMABLE DRIVER RETENTION FEATURES, now U.S.         Patent Application Publication No. 2018/0168586;     -   U.S. patent application Ser. No. 15/386,226, entitled DURABILITY         FEATURES FOR END EFFECTORS AND FIRING ASSEMBLIES OF SURGICAL         STAPLING INSTRUMENTS, now U.S. Patent Application Publication         No. 2018/0168648;     -   U.S. patent application Ser. No. 15/386,222, entitled SURGICAL         STAPLING INSTRUMENTS HAVING END EFFECTORS WITH POSITIVE OPENING         FEATURES, now U.S. Patent Application Publication No.         2018/0168647; and     -   U.S. patent application Ser. No. 15/386,236, entitled CONNECTION         PORTIONS FOR DISPOSABLE LOADING UNITS FOR SURGICAL STAPLING         INSTRUMENTS, now U.S. Patent Application Publication No.         2018/0168650.

Applicant of the present application owns the following U.S. Patent Applications that were filed on Dec. 21, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. patent application Ser. No. 15/385,887, entitled METHOD FOR         ATTACHING A SHAFT ASSEMBLY TO A SURGICAL INSTRUMENT AND,         ALTERNATIVELY, TO A SURGICAL ROBOT, now U.S. Pat. No.         10,835,245;     -   U.S. patent application Ser. No. 15/385,889, entitled SHAFT         ASSEMBLY COMPRISING A MANUALLY-OPERABLE RETRACTION SYSTEM FOR         USE WITH A MOTORIZED SURGICAL INSTRUMENT SYSTEM, now U.S. Patent         Application Publication No. 2018/0168590;     -   U.S. patent application Ser. No. 15/385,890, entitled SHAFT         ASSEMBLY COMPRISING SEPARATELY ACTUATABLE AND RETRACTABLE         SYSTEMS, now U.S. Pat. No. 10,675,025;     -   U.S. patent application Ser. No. 15/385,891, entitled SHAFT         ASSEMBLY COMPRISING A CLUTCH CONFIGURED TO ADAPT THE OUTPUT OF A         ROTARY FIRING MEMBER TO TWO DIFFERENT SYSTEMS, now U.S. Patent         Application Publication No. 2018/0168592;     -   U.S. patent application Ser. No. 15/385,892, entitled SURGICAL         SYSTEM COMPRISING A FIRING MEMBER ROTATABLE INTO AN ARTICULATION         STATE TO ARTICULATE AN END EFFECTOR OF THE SURGICAL SYSTEM, now         U.S. Pat. No. 10,918,385;     -   U.S. patent application Ser. No. 15/385,894, entitled SHAFT         ASSEMBLY COMPRISING A LOCKOUT, now U.S. Pat. No. 10,492,785; and     -   U.S. patent application Ser. No. 15/385,895, entitled SHAFT         ASSEMBLY COMPRISING FIRST AND SECOND ARTICULATION LOCKOUTS, now         U.S. Pat. No. 10,542,982.

Applicant of the present application owns the following U.S. Patent Applications that were filed on Dec. 21, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. patent application Ser. No. 15/385,916, entitled SURGICAL         STAPLING SYSTEMS, now U.S. Patent Application Publication No.         2018/0168575;     -   U.S. patent application Ser. No. 15/385,918, entitled SURGICAL         STAPLING SYSTEMS, now U.S. Patent Application Publication No.         2018/0168618;     -   U.S. patent application Ser. No. 15/385,919, entitled SURGICAL         STAPLING SYSTEMS, now U.S. Patent Application Publication No.         2018/0168619;     -   U.S. patent application Ser. No. 15/385,921, entitled SURGICAL         STAPLE CARTRIDGE WITH MOVABLE CAMMING MEMBER CONFIGURED TO         DISENGAGE FIRING MEMBER LOCKOUT FEATURES, now U.S. Pat. No.         10,687,809;     -   U.S. patent application Ser. No. 15/385,923, entitled SURGICAL         STAPLING SYSTEMS, now U.S. Patent Application Publication No.         2018/0168623;     -   U.S. patent application Ser. No. 15/385,925, entitled JAW         ACTUATED LOCK ARRANGEMENTS FOR PREVENTING ADVANCEMENT OF A         FIRING MEMBER IN A SURGICAL END EFFECTOR UNLESS AN UNFIRED         CARTRIDGE IS INSTALLED IN THE END EFFECTOR, now U.S. Pat. No.         10,517,595;     -   U.S. patent application Ser. No. 15/385,926, entitled AXIALLY         MOVABLE CLOSURE SYSTEM ARRANGEMENTS FOR APPLYING CLOSURE MOTIONS         TO JAWS OF SURGICAL INSTRUMENTS, now U.S. Patent Application         Publication No. 2018/0168577;     -   U.S. patent application Ser. No. 15/385,928, entitled PROTECTIVE         COVER ARRANGEMENTS FOR A JOINT INTERFACE BETWEEN A MOVABLE JAW         AND ACTUATOR SHAFT OF A SURGICAL INSTRUMENT, now U.S. Patent         Application Publication No. 2018/0168578;     -   U.S. patent application Ser. No. 15/385,930, entitled SURGICAL         END EFFECTOR WITH TWO SEPARATE COOPERATING OPENING FEATURES FOR         OPENING AND CLOSING END EFFECTOR JAWS, now U.S. Patent         Application Publication No. 2018/0168579;     -   U.S. patent application Ser. No. 15/385,932, entitled         ARTICULATABLE SURGICAL END EFFECTOR WITH ASYMMETRIC SHAFT         ARRANGEMENT, now U.S. Patent Application Publication No.         2018/0168628;     -   U.S. patent application Ser. No. 15/385,933, entitled         ARTICULATABLE SURGICAL INSTRUMENT WITH INDEPENDENT PIVOTABLE         LINKAGE DISTAL OF AN ARTICULATION LOCK, now U.S. Pat. No.         10,603,036;     -   U.S. patent application Ser. No. 15/385,934, entitled         ARTICULATION LOCK ARRANGEMENTS FOR LOCKING AN END EFFECTOR IN AN         ARTICULATED POSITION IN RESPONSE TO ACTUATION OF A JAW CLOSURE         SYSTEM, now U.S. Pat. No. 10,582,928;     -   U.S. patent application Ser. No. 15/385,935, entitled LATERALLY         ACTUATABLE ARTICULATION LOCK ARRANGEMENTS FOR LOCKING AN END         EFFECTOR OF A SURGICAL INSTRUMENT IN AN ARTICULATED         CONFIGURATION, now U.S. Pat. No. 10,524,789; and     -   U.S. patent application Ser. No. 15/385,936, entitled         ARTICULATABLE SURGICAL INSTRUMENTS WITH ARTICULATION STROKE         AMPLIFICATION FEATURES, now U.S. Pat. No. 10,517,596.

Applicant of the present application owns the following U.S. Patent Applications that were filed on Jun. 24, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. patent application Ser. No. 15/191,775, entitled STAPLE         CARTRIDGE COMPRISING WIRE STAPLES AND STAMPED STAPLES, now U.S.         Patent Application Publication No. 2017/0367695;     -   U.S. patent application Ser. No. 15/191,807, entitled STAPLING         SYSTEM FOR USE WITH WIRE STAPLES AND STAMPED STAPLES, now U.S.         Pat. No. 10,702,270;     -   U.S. patent application Ser. No. 15/191,834, entitled STAMPED         STAPLES AND STAPLE CARTRIDGES USING THE SAME, now U.S. Pat. No.         10,542,979;     -   U.S. patent application Ser. No. 15/191,788, entitled STAPLE         CARTRIDGE COMPRISING OVERDRIVEN STAPLES, now U.S. Pat. No.         10,675,024; and     -   U.S. patent application Ser. No. 15/191,818, entitled STAPLE         CARTRIDGE COMPRISING OFFSET LONGITUDINAL STAPLE ROWS, now U.S.         Pat. No. 10,893,863.

Applicant of the present application owns the following U.S. Patent Applications that were filed on Jun. 24, 2016 and which are each herein incorporated by reference in their respective entireties:

-   -   U.S. Design Patent Application Serial No. 29/569,218, entitled         SURGICAL FASTENER, now U.S. Design Pat. No. D826,405;     -   U.S. Design Patent Application Serial No. 29/569,227, entitled         SURGICAL FASTENER, now U.S. Design Pat. No. D822,206;     -   U.S. Design Patent Application Serial No. 29/569,259, entitled         SURGICAL FASTENER CARTRIDGE, now U.S. Design Pat. No. D847,989;         and     -   U.S. Design Patent Application Serial No. 29/569,264, entitled         SURGICAL FASTENER CARTRIDGE, now U.S. Design Pat. No. D850,617.

Applicant of the present application owns the following patent applications that were filed on Apr. 1, 2016 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 15/089,325, entitled METHOD FOR         OPERATING A SURGICAL STAPLING SYSTEM, now U.S. Patent         Application Publication No. 2017/0281171;     -   U.S. patent application Ser. No. 15/089,321, entitled MODULAR         SURGICAL STAPLING SYSTEM COMPRISING A DISPLAY, now U.S. Pat. No.         10,271,851;     -   U.S. patent application Ser. No. 15/089,326, entitled SURGICAL         STAPLING SYSTEM COMPRISING A DISPLAY INCLUDING A RE-ORIENTABLE         DISPLAY FIELD, now U.S. Pat. No. 10,433,849;     -   U.S. patent application Ser. No. 15/089,263, entitled SURGICAL         INSTRUMENT HANDLE ASSEMBLY WITH RECONFIGURABLE GRIP PORTION, now         U.S. Pat. No. 10,307,159;     -   U.S. patent application Ser. No. 15/089,262, entitled ROTARY         POWERED SURGICAL INSTRUMENT WITH MANUALLY ACTUATABLE BAILOUT         SYSTEM, now U.S. Pat. No. 10,357,246;     -   U.S. patent application Ser. No. 15/089,277, entitled SURGICAL         CUTTING AND STAPLING END EFFECTOR WITH ANVIL CONCENTRIC DRIVE         MEMBER, now U.S. Pat. No. 10,531,874;     -   U.S. patent application Ser. No. 15/089,296, entitled         INTERCHANGEABLE SURGICAL TOOL ASSEMBLY WITH A SURGICAL END         EFFECTOR THAT IS SELECTIVELY ROTATABLE ABOUT A SHAFT AXIS, now         U.S. Pat. No. 10,413,293;     -   U.S. patent application Ser. No. 15/089,258, entitled SURGICAL         STAPLING SYSTEM COMPRISING A SHIFTABLE TRANSMISSION, now U.S.         Pat. No. 10,342,543;     -   U.S. patent application Ser. No. 15/089,278, entitled SURGICAL         STAPLING SYSTEM CONFIGURED TO PROVIDE SELECTIVE CUTTING OF         TISSUE, now U.S. Pat. No. 10,420,552;     -   U.S. patent application Ser. No. 15/089,284, entitled SURGICAL         STAPLING SYSTEM COMPRISING A CONTOURABLE SHAFT, now U.S. Patent         Application Publication No. 2017/0281186;     -   U.S. patent application Ser. No. 15/089,295, entitled SURGICAL         STAPLING SYSTEM COMPRISING A TISSUE COMPRESSION LOCKOUT, now         U.S. Pat. No. 10,856,867;     -   U.S. patent application Ser. No. 15/089,300, entitled SURGICAL         STAPLING SYSTEM COMPRISING AN UNCLAMPING LOCKOUT, now U.S. Pat.         No. 10,456,140;     -   U.S. patent application Ser. No. 15/089,196, entitled SURGICAL         STAPLING SYSTEM COMPRISING A JAW CLOSURE LOCKOUT, now U.S. Pat.         No. 10,568,632;     -   U.S. patent application Ser. No. 15/089,203, entitled SURGICAL         STAPLING SYSTEM COMPRISING A JAW ATTACHMENT LOCKOUT, now U.S.         Pat. No. 10,542,991;     -   U.S. patent application Ser. No. 15/089,210, entitled SURGICAL         STAPLING SYSTEM COMPRISING A SPENT CARTRIDGE LOCKOUT, now U.S.         Pat. No. 10,478,190;     -   U.S. patent application Ser. No. 15/089,324, entitled SURGICAL         INSTRUMENT COMPRISING A SHIFTING MECHANISM, now U.S. Pat. No.         10,314,582;     -   U.S. patent application Ser. No. 15/089,335, entitled SURGICAL         STAPLING INSTRUMENT COMPRISING MULTIPLE LOCKOUTS, now U.S. Pat.         No. 10,485,542;     -   U.S. patent application Ser. No. 15/089,339, entitled SURGICAL         STAPLING INSTRUMENT, now U.S. Patent Application Publication No.         2017/0281173;     -   U.S. patent application Ser. No. 15/089,253, entitled SURGICAL         STAPLING SYSTEM CONFIGURED TO APPLY ANNULAR ROWS OF STAPLES         HAVING DIFFERENT HEIGHTS, now U.S. Pat. No. 10,413,297;     -   U.S. patent application Ser. No. 15/089,304, entitled SURGICAL         STAPLING SYSTEM COMPRISING A GROOVED FORMING POCKET, now U.S.         Pat. No. 10,285,705;     -   U.S. patent application Ser. No. 15/089,331, entitled ANVIL         MODIFICATION MEMBERS FOR SURGICAL STAPLERS, now U.S. Pat. No.         10,376,263;     -   U.S. patent application Ser. No. 15/089,336, entitled STAPLE         CARTRIDGES WITH ATRAUMATIC FEATURES, now U.S. Pat. No.         10,709,446;     -   U.S. patent application Ser. No. 15/089,312, entitled CIRCULAR         STAPLING SYSTEM COMPRISING AN INCISABLE TISSUE SUPPORT, now U.S.         Patent Application Publication No. 2017/0281189;     -   U.S. patent application Ser. No. 15/089,309, entitled CIRCULAR         STAPLING SYSTEM COMPRISING ROTARY FIRING SYSTEM, now U.S. Pat.         No. 10,675,021; and     -   U.S. patent application Ser. No. 15/089,349, entitled CIRCULAR         STAPLING SYSTEM COMPRISING LOAD CONTROL, now U.S. Pat. No.         10,682,136.

Applicant of the present application also owns the U.S. Patent Applications identified below which were filed on Dec. 31, 2015 which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 14/984,488, entitled MECHANISMS         FOR COMPENSATING FOR BATTERY PACK FAILURE IN POWERED SURGICAL         INSTRUMENTS, now U.S. Pat. No. 10,292,704;     -   U.S. patent application Ser. No. 14/984,525, entitled MECHANISMS         FOR COMPENSATING FOR DRIVETRAIN FAILURE IN POWERED SURGICAL         INSTRUMENTS, now U.S. Pat. No. 10,368,865; and     -   U.S. patent application Ser. No. 14/984,552, entitled SURGICAL         INSTRUMENTS WITH SEPARABLE MOTORS AND MOTOR CONTROL CIRCUITS,         now U.S. Pat. No. 10,265,068.

Applicant of the present application also owns the U.S. Patent Applications identified below which were filed on Feb. 9, 2016 which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 15/019,220, entitled SURGICAL         INSTRUMENT WITH ARTICULATING AND AXIALLY TRANSLATABLE END         EFFECTOR, now U.S. Pat. No. 10,245,029;     -   U.S. patent application Ser. No. 15/019,228, entitled SURGICAL         INSTRUMENTS WITH MULTIPLE LINK ARTICULATION ARRANGEMENTS, now         U.S. Pat. No. 10,433,837;     -   U.S. patent application Ser. No. 15/019,196, entitled SURGICAL         INSTRUMENT ARTICULATION MECHANISM WITH SLOTTED SECONDARY         CONSTRAINT, now U.S. Pat. No. 10,413,291;     -   U.S. patent application Ser. No. 15/019,206, entitled SURGICAL         INSTRUMENTS WITH AN END EFFECTOR THAT IS HIGHLY ARTICULATABLE         RELATIVE TO AN ELONGATE SHAFT ASSEMBLY, now U.S. Pat. No.         10,653,413;     -   U.S. patent application Ser. No. 15/019,215, entitled SURGICAL         INSTRUMENTS WITH NON-SYMMETRICAL ARTICULATION ARRANGEMENTS, now         U.S. Patent Application Publication No. 2017/0224332;     -   U.S. patent application Ser. No. 15/019,227, entitled         ARTICULATABLE SURGICAL INSTRUMENTS WITH SINGLE ARTICULATION LINK         ARRANGEMENTS, now U.S. Patent Application Publication No.         2017/0224334;     -   U.S. patent application Ser. No. 15/019,235, entitled SURGICAL         INSTRUMENTS WITH TENSIONING ARRANGEMENTS FOR CABLE DRIVEN         ARTICULATION SYSTEMS, now U.S. Pat. No. 10,245,030;     -   U.S. patent application Ser. No. 15/019,230, entitled         ARTICULATABLE SURGICAL INSTRUMENTS WITH OFF-AXIS FIRING BEAM         ARRANGEMENTS, now U.S. Pat. No. 10,588,625; and     -   U.S. patent application Ser. No. 15/019,245, entitled SURGICAL         INSTRUMENTS WITH CLOSURE STROKE REDUCTION ARRANGEMENTS, now U.S.         Pat. No. 10,470,764.

Applicant of the present application also owns the U.S. Patent Applications identified below which were filed on Feb. 12, 2016 which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 15/043,254, entitled MECHANISMS         FOR COMPENSATING FOR DRIVETRAIN FAILURE IN POWERED SURGICAL         INSTRUMENTS, now U.S. Pat. No. 10,258,331;     -   U.S. patent application Ser. No. 15/043,259, entitled MECHANISMS         FOR COMPENSATING FOR DRIVETRAIN FAILURE IN POWERED SURGICAL         INSTRUMENTS, now U.S. Pat. No. 10,448,948;     -   U.S. patent application Ser. No. 15/043,275, entitled MECHANISMS         FOR COMPENSATING FOR DRIVETRAIN FAILURE IN POWERED SURGICAL         INSTRUMENTS, now U.S. Patent Application Publication No.         2017/0231627; and     -   U.S. patent application Ser. No. 15/043,289, entitled MECHANISMS         FOR COMPENSATING FOR DRIVETRAIN FAILURE IN POWERED SURGICAL         INSTRUMENTS, now U.S. Patent Application Publication No.         2017/0231628.

Applicant of the present application owns the following patent applications that were filed on Jun. 18, 2015 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 14/742,925, entitled SURGICAL         END EFFECTORS WITH POSITIVE JAW OPENING ARRANGEMENTS, now U.S.         Pat. No. 10,182,818;     -   U.S. patent application Ser. No. 14/742,941, entitled SURGICAL         END EFFECTORS WITH DUAL CAM ACTUATED JAW CLOSING FEATURES, now         U.S. Pat. No. 10,052,102;     -   U.S. patent application Ser. No. 14/742,914, entitled MOVABLE         FIRING BEAM SUPPORT ARRANGEMENTS FOR ARTICULATABLE SURGICAL         INSTRUMENTS, now U.S. Pat. No. 10,405,863;     -   U.S. patent application Ser. No. 14/742,900, entitled         ARTICULATABLE SURGICAL INSTRUMENTS WITH COMPOSITE FIRING BEAM         STRUCTURES WITH CENTER FIRING SUPPORT MEMBER FOR ARTICULATION         SUPPORT, now U.S. Pat. No. 10,224,149;     -   U.S. patent application Ser. No. 14/742,885, entitled DUAL         ARTICULATION DRIVE SYSTEM ARRANGEMENTS FOR ARTICULATABLE         SURGICAL INSTRUMENTS, now U.S. Pat. No. 10,368,861; and     -   U.S. patent application Ser. No. 14/742,876, entitled PUSH/PULL         ARTICULATION DRIVE SYSTEMS FOR ARTICULATABLE SURGICAL         INSTRUMENTS, now U.S. Pat. No. 10,178,992.

Applicant of the present application owns the following patent applications that were filed on Mar. 6, 2015 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 14/640,746, entitled POWERED         SURGICAL INSTRUMENT, now U.S. Pat. No. 9,808,246;     -   U.S. patent application Ser. No. 14/640,795, entitled MULTIPLE         LEVEL THRESHOLDS TO MODIFY OPERATION OF POWERED SURGICAL         INSTRUMENTS, now U.S. Pat. No. 10,441,279;     -   U.S. patent application Ser. No. 14/640,832, entitled ADAPTIVE         TISSUE COMPRESSION TECHNIQUES TO ADJUST CLOSURE RATES FOR         MULTIPLE TISSUE TYPES, now U.S. Pat. No. 10,687,806;     -   U.S. patent application Ser. No. 14/640,935, entitled OVERLAID         MULTI SENSOR RADIO FREQUENCY (RF) ELECTRODE SYSTEM TO MEASURE         TISSUE COMPRESSION, now U.S. Pat. No. 10,548,504;     -   U.S. patent application Ser. No. 14/640,831, entitled MONITORING         SPEED CONTROL AND PRECISION INCREMENTING OF MOTOR FOR POWERED         SURGICAL INSTRUMENTS, now U.S. Pat. No. 9,895,148;     -   U.S. patent application Ser. No. 14/640,859, entitled TIME         DEPENDENT EVALUATION OF SENSOR DATA TO DETERMINE STABILITY,         CREEP, AND VISCOELASTIC ELEMENTS OF MEASURES, now U.S. Pat. No.         10,052,044;     -   U.S. patent application Ser. No. 14/640,817, entitled         INTERACTIVE FEEDBACK SYSTEM FOR POWERED SURGICAL INSTRUMENTS,         now U.S. Pat. No. 9,924,961;     -   U.S. patent application Ser. No. 14/640,844, entitled CONTROL         TECHNIQUES AND SUB-PROCESSOR CONTAINED WITHIN MODULAR SHAFT WITH         SELECT CONTROL PROCESSING FROM HANDLE, now U.S. Pat. No.         10,045,776;     -   U.S. patent application Ser. No. 14/640,837, entitled SMART         SENSORS WITH LOCAL SIGNAL PROCESSING, now U.S. Pat. No.         9,993,248;     -   U.S. patent application Ser. No. 14/640,765, entitled SYSTEM FOR         DETECTING THE MIS-INSERTION OF A STAPLE CARTRIDGE INTO A         SURGICAL STAPLER, now U.S. Pat. No. 10,617,412;     -   U.S. patent application Ser. No. 14/640,799, entitled SIGNAL AND         POWER COMMUNICATION SYSTEM POSITIONED ON A ROTATABLE SHAFT, now         U.S. Pat. No. 9,901,342; and     -   U.S. patent application Ser. No. 14/640,780, entitled SURGICAL         INSTRUMENT COMPRISING A LOCKABLE BATTERY HOUSING, now U.S. Pat.         No. 10,245,033.

Applicant of the present application owns the following patent applications that were filed on Feb. 27, 2015, and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 14/633,576, entitled SURGICAL         INSTRUMENT SYSTEM COMPRISING AN INSPECTION STATION, now U.S.         Pat. No. 10,045,779;     -   U.S. patent application Ser. No. 14/633,546, entitled SURGICAL         APPARATUS CONFIGURED TO ASSESS WHETHER A PERFORMANCE PARAMETER         OF THE SURGICAL APPARATUS IS WITHIN AN ACCEPTABLE PERFORMANCE         BAND, now U.S. Pat. No. 10,180,463;     -   U.S. patent application Ser. No. 14/633,560, entitled SURGICAL         CHARGING SYSTEM THAT CHARGES AND/OR CONDITIONS ONE OR MORE         BATTERIES, now U.S. Patent Application Publication No.         2016/0249910;     -   U.S. patent application Ser. No. 14/633,566, entitled CHARGING         SYSTEM THAT ENABLES EMERGENCY RESOLUTIONS FOR CHARGING A         BATTERY, now U.S. Pat. No. 10,182,816;     -   U.S. patent application Ser. No. 14/633,555, entitled SYSTEM FOR         MONITORING WHETHER A SURGICAL INSTRUMENT NEEDS TO BE SERVICED,         now U.S. Pat. No. 10,321,907;     -   U.S. patent application Ser. No. 14/633,542, entitled REINFORCED         BATTERY FOR A SURGICAL INSTRUMENT, now U.S. Pat. No. 9,931,118;     -   U.S. patent application Ser. No. 14/633,548, entitled POWER         ADAPTER FOR A SURGICAL INSTRUMENT, now U.S. Pat. No. 10,245,028;     -   U.S. patent application Ser. No. 14/633,526, entitled ADAPTABLE         SURGICAL INSTRUMENT HANDLE, now U.S. Pat. No. 9,993,258;     -   U.S. patent application Ser. No. 14/633,541, entitled MODULAR         STAPLING ASSEMBLY, now U.S. Pat. No. 10,226,250; and     -   U.S. patent application Ser. No. 14/633,562, entitled SURGICAL         APPARATUS CONFIGURED TO TRACK AN END-OF-LIFE PARAMETER, now U.S.         Pat. No. 10,159,483.

Applicant of the present application owns the following patent applications that were filed on Dec. 18, 2014 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 14/574,478, entitled SURGICAL         INSTRUMENT SYSTEMS COMPRISING AN ARTICULATABLE END EFFECTOR AND         MEANS FOR ADJUSTING THE FIRING STROKE OF A FIRING MEMBER, now         U.S. Pat. No. 9,844,374;     -   U.S. patent application Ser. No. 14/574,483, entitled SURGICAL         INSTRUMENT ASSEMBLY COMPRISING LOCKABLE SYSTEMS, now U.S. Pat.         No. 10,188,385;     -   U.S. patent application Ser. No. 14/575,139, entitled DRIVE         ARRANGEMENTS FOR ARTICULATABLE SURGICAL INSTRUMENTS, now U.S.         Pat. No. 9,844,375;     -   U.S. patent application Ser. No. 14/575,148, entitled LOCKING         ARRANGEMENTS FOR DETACHABLE SHAFT ASSEMBLIES WITH ARTICULATABLE         SURGICAL END EFFECTORS, now U.S. Pat. No. 10,085,748;     -   U.S. patent application Ser. No. 14/575,130, entitled SURGICAL         INSTRUMENT WITH AN ANVIL THAT IS SELECTIVELY MOVABLE ABOUT A         DISCRETE NON-MOVABLE AXIS RELATIVE TO A STAPLE CARTRIDGE, now         U.S. Pat. No. 10,245,027;     -   U.S. patent application Ser. No. 14/575,143, entitled SURGICAL         INSTRUMENTS WITH IMPROVED CLOSURE ARRANGEMENTS, now U.S. Pat.         No. 10,004,501;     -   U.S. patent application Ser. No. 14/575,117, entitled SURGICAL         INSTRUMENTS WITH ARTICULATABLE END EFFECTORS AND MOVABLE FIRING         BEAM SUPPORT ARRANGEMENTS, now U.S. Pat. No. 9,943,309;     -   U.S. patent application Ser. No. 14/575,154, entitled SURGICAL         INSTRUMENTS WITH ARTICULATABLE END EFFECTORS AND IMPROVED FIRING         BEAM SUPPORT ARRANGEMENTS, now U.S. Pat. No. 9,968,355;     -   U.S. patent application Ser. No. 14/574,493, entitled SURGICAL         INSTRUMENT ASSEMBLY COMPRISING A FLEXIBLE ARTICULATION SYSTEM,         now U.S. Pat. No. 9,987,000; and     -   U.S. patent application Ser. No. 14/574,500, entitled SURGICAL         INSTRUMENT ASSEMBLY COMPRISING A LOCKABLE ARTICULATION SYSTEM,         now U.S. Pat. No. 10,117,649.

Applicant of the present application owns the following patent applications that were filed on Mar. 1, 2013 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 13/782,295, entitled         ARTICULATABLE SURGICAL INSTRUMENTS WITH CONDUCTIVE PATHWAYS FOR         SIGNAL COMMUNICATION, now U.S. Pat. No. 9,700,309;     -   U.S. patent application Ser. No. 13/782,323, entitled ROTARY         POWERED ARTICULATION JOINTS FOR SURGICAL INSTRUMENTS, now U.S.         Pat. No. 9,782,169;     -   U.S. patent application Ser. No. 13/782,338, entitled THUMBWHEEL         SWITCH ARRANGEMENTS FOR SURGICAL INSTRUMENTS, now U.S. Patent         Application Publication No. 2014/0249557;     -   U.S. patent application Ser. No. 13/782,499, entitled         ELECTROMECHANICAL SURGICAL DEVICE WITH SIGNAL RELAY ARRANGEMENT,         now U.S. Pat. No. 9,358,003;     -   U.S. patent application Ser. No. 13/782,460, entitled MULTIPLE         PROCESSOR MOTOR CONTROL FOR MODULAR SURGICAL INSTRUMENTS, now         U.S. Pat. No. 9,554,794;     -   U.S. patent application Ser. No. 13/782,358, entitled JOYSTICK         SWITCH ASSEMBLIES FOR SURGICAL INSTRUMENTS, now U.S. Pat. No.         9,326,767;     -   U.S. patent application Ser. No. 13/782,481, entitled SENSOR         STRAIGHTENED END EFFECTOR DURING REMOVAL THROUGH TROCAR, now         U.S. Pat. No. 9,468,438;     -   U.S. patent application Ser. No. 13/782,518, entitled CONTROL         METHODS FOR SURGICAL INSTRUMENTS WITH REMOVABLE IMPLEMENT         PORTIONS, now U.S. Patent Application Publication No.         2014/0246475;     -   U.S. patent application Ser. No. 13/782,375, entitled ROTARY         POWERED SURGICAL INSTRUMENTS WITH MULTIPLE DEGREES OF FREEDOM,         now U.S. Pat. No. 9,398,911; and     -   U.S. patent application Ser. No. 13/782,536, entitled SURGICAL         INSTRUMENT SOFT STOP, now U.S. Pat. No. 9,307,986.

Applicant of the present application also owns the following patent applications that were filed on Mar. 14, 2013 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 13/803,097, entitled         ARTICULATABLE SURGICAL INSTRUMENT COMPRISING A FIRING DRIVE, now         U.S. Pat. No. 9,687,230;     -   U.S. patent application Ser. No. 13/803,193, entitled CONTROL         ARRANGEMENTS FOR A DRIVE MEMBER OF A SURGICAL INSTRUMENT, now         U.S. Pat. No. 9,332,987;     -   U.S. patent application Ser. No. 13/803,053, entitled         INTERCHANGEABLE SHAFT ASSEMBLIES FOR USE WITH A SURGICAL         INSTRUMENT, now U.S. Pat. No. 9,883,860;     -   U.S. patent application Ser. No. 13/803,086, entitled         ARTICULATABLE SURGICAL INSTRUMENT COMPRISING AN ARTICULATION         LOCK, now U.S. Patent Application Publication No. 2014/0263541;     -   U.S. patent application Ser. No. 13/803,210, entitled SENSOR         ARRANGEMENTS FOR ABSOLUTE POSITIONING SYSTEM FOR SURGICAL         INSTRUMENTS, now U.S. Pat. No. 9,808,244;     -   U.S. patent application Ser. No. 13/803,148, entitled         MULTI-FUNCTION MOTOR FOR A SURGICAL INSTRUMENT, now U.S. Pat.         No. 10,470,762;     -   U.S. patent application Ser. No. 13/803,066, entitled DRIVE         SYSTEM LOCKOUT ARRANGEMENTS FOR MODULAR SURGICAL INSTRUMENTS,         now U.S. Pat. No. 9,134,287;     -   U.S. patent application Ser. No. 13/803,117, entitled         ARTICULATION CONTROL SYSTEM FOR ARTICULATABLE SURGICAL         INSTRUMENTS, now U.S. Pat. No. 9,351,726;     -   U.S. patent application Ser. No. 13/803,130, entitled DRIVE         TRAIN CONTROL ARRANGEMENTS FOR MODULAR SURGICAL INSTRUMENTS, now         U.S. Pat. No. 9,351,727; and     -   U.S. patent application Ser. No. 13/803,159, entitled METHOD AND         SYSTEM FOR OPERATING A SURGICAL INSTRUMENT, now U.S. Pat. No.         9,888,919.

Applicant of the present application also owns the following patent application that was filed on Mar. 7, 2014 and is herein incorporated by reference in its entirety:

-   -   U.S. patent application Ser. No. 14/200,111, entitled CONTROL         SYSTEMS FOR SURGICAL INSTRUMENTS, now U.S. Pat. No. 9,629,629.

Applicant of the present application also owns the following patent applications that were filed on Mar. 26, 2014 and are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 14/226,106, entitled POWER         MANAGEMENT CONTROL SYSTEMS FOR SURGICAL INSTRUMENTS, now U.S.         Patent Application Publication No. 2015/0272582;     -   U.S. patent application Ser. No. 14/226,099, entitled         STERILIZATION VERIFICATION CIRCUIT, now U.S. Pat. No. 9,826,977;     -   U.S. patent application Ser. No. 14/226,094, entitled         VERIFICATION OF NUMBER OF BATTERY EXCHANGES/PROCEDURE COUNT, now         U.S. Patent Application Publication No. 2015/0272580;     -   U.S. patent application Ser. No. 14/226,117, entitled POWER         MANAGEMENT THROUGH SLEEP OPTIONS OF SEGMENTED CIRCUIT AND WAKE         UP CONTROL, now U.S. Pat. No. 10,013,049;     -   U.S. patent application Ser. No. 14/226,075, entitled MODULAR         POWERED SURGICAL INSTRUMENT WITH DETACHABLE SHAFT ASSEMBLIES,         now U.S. Pat. No. 9,743,929;     -   U.S. patent application Ser. No. 14/226,093, entitled FEEDBACK         ALGORITHMS FOR MANUAL BAILOUT SYSTEMS FOR SURGICAL INSTRUMENTS,         now U.S. Pat. No. 10,028,761;     -   U.S. patent application Ser. No. 14/226,116, entitled SURGICAL         INSTRUMENT UTILIZING SENSOR ADAPTATION, now U.S. Patent         Application Publication No. 2015/0272571;     -   U.S. patent application Ser. No. 14/226,071, entitled SURGICAL         INSTRUMENT CONTROL CIRCUIT HAVING A SAFETY PROCESSOR, now U.S.         Pat. No. 9,690,362;     -   U.S. patent application Ser. No. 14/226,097, entitled SURGICAL         INSTRUMENT COMPRISING INTERACTIVE SYSTEMS, now U.S. Pat. No.         9,820,738;     -   U.S. patent application Ser. No. 14/226,126, entitled INTERFACE         SYSTEMS FOR USE WITH SURGICAL INSTRUMENTS, now U.S. Pat. No.         10,004,497;     -   U.S. patent application Ser. No. 14/226,133, entitled MODULAR         SURGICAL INSTRUMENT SYSTEM, now U.S. Patent Application         Publication No. 2015/0272557;     -   U.S. patent application Ser. No. 14/226,081, entitled SYSTEMS         AND METHODS FOR CONTROLLING A SEGMENTED CIRCUIT, now U.S. Pat.         No. 9,804,618;     -   U.S. patent application Ser. No. 14/226,076, entitled POWER         MANAGEMENT THROUGH SEGMENTED CIRCUIT AND VARIABLE VOLTAGE         PROTECTION, now U.S. Pat. No. 9,733,663;     -   U.S. patent application Ser. No. 14/226,111, entitled SURGICAL         STAPLING INSTRUMENT SYSTEM, now U.S. Pat. No. 9,750,499; and     -   U.S. patent application Ser. No. 14/226,125, entitled SURGICAL         INSTRUMENT COMPRISING A ROTATABLE SHAFT, now U.S. Pat. No.         10,201,364.

Applicant of the present application also owns the following patent applications that were filed on Sep. 5, 2014 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 14/479,103, entitled CIRCUITRY         AND SENSORS FOR POWERED MEDICAL DEVICE, now U.S. Pat. No.         10,111,679;     -   U.S. patent application Ser. No. 14/479,119, entitled ADJUNCT         WITH INTEGRATED SENSORS TO QUANTIFY TISSUE COMPRESSION, now U.S.         Pat. No. 9,724,094;     -   U.S. patent application Ser. No. 14/478,908, entitled MONITORING         DEVICE DEGRADATION BASED ON COMPONENT EVALUATION, now U.S. Pat.         No. 9,737,301;     -   U.S. patent application Ser. No. 14/478,895, entitled MULTIPLE         SENSORS WITH ONE SENSOR AFFECTING A SECOND SENSOR'S OUTPUT OR         INTERPRETATION, now U.S. Pat. No. 9,757,128;     -   U.S. patent application Ser. No. 14/479,110, entitled POLARITY         OF HALL MAGNET TO DETECT MISLOADED CARTRIDGE, now U.S. Pat. No.         10,016,199;     -   U.S. patent application Ser. No. 14/479,098, entitled SMART         CARTRIDGE WAKE UP OPERATION AND DATA RETENTION, now U.S. Pat.         No. 10,135,242;     -   U.S. patent application Ser. No. 14/479,115, entitled MULTIPLE         MOTOR CONTROL FOR POWERED MEDICAL DEVICE, now U.S. Pat. No.         9,788,836; and     -   U.S. patent application Ser. No. 14/479,108, entitled LOCAL         DISPLAY OF TISSUE PARAMETER STABILIZATION, now U.S. Patent         Application Publication No. 2016/0066913.

Applicant of the present application also owns the following patent applications that were filed on Apr. 9, 2014 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. patent application Ser. No. 14/248,590, entitled MOTOR         DRIVEN SURGICAL INSTRUMENTS WITH LOCKABLE DUAL DRIVE SHAFTS, now         U.S. Pat. No. 9,826,976;     -   U.S. patent application Ser. No. 14/248,581, entitled SURGICAL         INSTRUMENT COMPRISING A CLOSING DRIVE AND A FIRING DRIVE         OPERATED FROM THE SAME ROTATABLE OUTPUT, now U.S. Pat. No.         9,649,110;     -   U.S. patent application Ser. No. 14/248,595, entitled SURGICAL         INSTRUMENT SHAFT INCLUDING SWITCHES FOR CONTROLLING THE         OPERATION OF THE SURGICAL INSTRUMENT, now U.S. Pat. No.         9,844,368;     -   U.S. patent application Ser. No. 14/248,588, entitled POWERED         LINEAR SURGICAL STAPLER, now U.S. Pat. No. 10,405,857;     -   U.S. patent application Ser. No. 14/248,591, entitled         TRANSMISSION ARRANGEMENT FOR A SURGICAL INSTRUMENT, now U.S.         Pat. No. 10,149,680;     -   U.S. patent application Ser. No. 14/248,584, entitled MODULAR         MOTOR DRIVEN SURGICAL INSTRUMENTS WITH ALIGNMENT FEATURES FOR         ALIGNING ROTARY DRIVE SHAFTS WITH SURGICAL END EFFECTOR SHAFTS,         now U.S. Pat. No. 9,801,626;     -   U.S. patent application Ser. No. 14/248,587, entitled POWERED         SURGICAL STAPLER, now U.S. Pat. No. 9,867,612;     -   U.S. patent application Ser. No. 14/248,586, entitled DRIVE         SYSTEM DECOUPLING ARRANGEMENT FORA SURGICAL INSTRUMENT, now U.S.         Pat. No. 10,136,887; and     -   U.S. patent application Ser. No. 14/248,607, entitled MODULAR         MOTOR DRIVEN SURGICAL INSTRUMENTS WITH STATUS INDICATION         ARRANGEMENTS, now U.S. Pat. No. 9,814,460.

Applicant of the present application also owns the following patent applications that were filed on Apr. 16, 2013 and which are each herein incorporated by reference in their respective entirety:

-   -   U.S. Provisional Patent Application Ser. No. 61/812,365,         entitled SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED         BY A SINGLE MOTOR;     -   U.S. Provisional Patent Application Ser. No. 61/812,376,         entitled LINEAR CUTTER WITH POWER;     -   U.S. Provisional Patent Application Ser. No. 61/812,382,         entitled LINEAR CUTTER WITH MOTOR AND PISTOL GRIP;     -   U.S. Provisional Patent Application Ser. No. 61/812,385,         entitled SURGICAL INSTRUMENT HANDLE WITH MULTIPLE ACTUATION         MOTORS AND MOTOR CONTROL; and     -   U.S. Provisional Patent Application Ser. No. 61/812,372,         entitled SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED         BY A SINGLE MOTOR.

Numerous specific details are set forth to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. Well-known operations, components, and elements have not been described in detail so as not to obscure the embodiments described in the specification. The reader will understand that the embodiments described and illustrated herein are non-limiting examples, and thus it can be appreciated that the specific structural and functional details disclosed herein may be representative and illustrative. Variations and changes thereto may be made without departing from the scope of the claims.

The terms “comprise” (and any form of comprise, such as “comprises” and “comprising”), “have” (and any form of have, such as “has” and “having”), “include” (and any form of include, such as “includes” and “including”) and “contain” (and any form of contain, such as “contains” and “containing”) are open-ended linking verbs. As a result, a surgical system, device, or apparatus that “comprises,” “has,” “includes” or “contains” one or more elements possesses those one or more elements, but is not limited to possessing only those one or more elements. Likewise, an element of a system, device, or apparatus that “comprises,” “has,” “includes” or “contains” one or more features possesses those one or more features, but is not limited to possessing only those one or more features.

The terms “proximal” and “distal” are used herein with reference to a clinician manipulating the handle portion of the surgical instrument. The term “proximal” refers to the portion closest to the clinician and the term “distal” refers to the portion located away from the clinician. It will be further appreciated that, for convenience and clarity, spatial terms such as “vertical”, “horizontal”, “up”, and “down” may be used herein with respect to the drawings. However, surgical instruments are used in many orientations and positions, and these terms are not intended to be limiting and/or absolute.

Various exemplary devices and methods are provided for performing laparoscopic and minimally invasive surgical procedures. However, the reader will readily appreciate that the various methods and devices disclosed herein can be used in numerous surgical procedures and applications including, for example, in connection with open surgical procedures. As the present Detailed Description proceeds, the reader will further appreciate that the various instruments disclosed herein can be inserted into a body in any way, such as through a natural orifice, through an incision or puncture hole formed in tissue, etc. The working portions or end effector portions of the instruments can be inserted directly into a patient's body or can be inserted through an access device that has a working channel through which the end effector and elongate shaft of a surgical instrument can be advanced.

A surgical stapling system can comprise a shaft and an end effector extending from the shaft. The end effector comprises a first jaw and a second jaw. The first jaw comprises a staple cartridge. The staple cartridge is insertable into and removable from the first jaw; however, other embodiments are envisioned in which a staple cartridge is not removable from, or at least readily replaceable from, the first jaw. The second jaw comprises an anvil configured to deform staples ejected from the staple cartridge. The second jaw is pivotable relative to the first jaw about a closure axis; however, other embodiments are envisioned in which the first jaw is pivotable relative to the second jaw. The surgical stapling system further comprises an articulation joint configured to permit the end effector to be rotated, or articulated, relative to the shaft. The end effector is rotatable about an articulation axis extending through the articulation joint. Other embodiments are envisioned which do not include an articulation joint.

The staple cartridge comprises a cartridge body. The cartridge body includes a proximal end, a distal end, and a deck extending between the proximal end and the distal end. In use, the staple cartridge is positioned on a first side of the tissue to be stapled and the anvil is positioned on a second side of the tissue. The anvil is moved toward the staple cartridge to compress and clamp the tissue against the deck. Thereafter, staples removably stored in the cartridge body can be deployed into the tissue. The cartridge body includes staple cavities defined therein wherein staples are removably stored in the staple cavities. The staple cavities are arranged in six longitudinal rows. Three rows of staple cavities are positioned on a first side of a longitudinal slot and three rows of staple cavities are positioned on a second side of the longitudinal slot. Other arrangements of staple cavities and staples may be possible.

The staples are supported by staple drivers in the cartridge body. The drivers are movable between a first, or unfired position, and a second, or fired, position to eject the staples from the staple cavities. The drivers are retained in the cartridge body by a retainer which extends around the bottom of the cartridge body and includes resilient members configured to grip the cartridge body and hold the retainer to the cartridge body. The drivers are movable between their unfired positions and their fired positions by a sled. The sled is movable between a proximal position adjacent the proximal end and a distal position adjacent the distal end. The sled comprises a plurality of ramped surfaces configured to slide under the drivers and lift the drivers, and the staples supported thereon, toward the anvil.

Further to the above, the sled is moved distally by a firing member. The firing member is configured to contact the sled and push the sled toward the distal end. The longitudinal slot defined in the cartridge body is configured to receive the firing member. The anvil also includes a slot configured to receive the firing member. The firing member further comprises a first cam which engages the first jaw and a second cam which engages the second jaw. As the firing member is advanced distally, the first cam and the second cam can control the distance, or tissue gap, between the deck of the staple cartridge and the anvil. The firing member also comprises a knife configured to incise the tissue captured intermediate the staple cartridge and the anvil. It is desirable for the knife to be positioned at least partially proximal to the ramped surfaces such that the staples are ejected ahead of the knife.

A surgical instrument comprising a handle 110 and a shaft assembly 1100 removably attachable to the handle 110 is illustrated in FIGS. 1-1J. The shaft assembly 1000 comprises an attachment portion 1100 configured to releasably attach the shaft assembly 1000 to the handle 110, a frame assembly 1200 extending distally from the attachment portion 1100, and an end effector rotatably coupled to the frame assembly 1200 about an articulation joint 1700. The end effector comprises a cartridge jaw 2020—which is configured to receive a staple cartridge 2010 therein—and an anvil jaw 2030. Referring primarily to FIG. 1E, the anvil jaw 2030 is rotatably coupled to the cartridge jaw 2020 about pins 2025. The shaft assembly 1000 further comprises a closure system 1300 configured to move the anvil jaw 2030 toward the cartridge jaw 2020, as discussed in greater detail further below. In addition, the shaft assembly 1000 further comprises a firing system 1400 configured to eject the staples removably stored in the staple cartridge 2010 and deform the staples against the anvil jaw 2030.

Referring primarily to FIGS. 1A, 1C, and 1D, the attachment portion 1100 comprises a lower frame 1110 and, in addition, an upper frame 1120 attached to the lower frame 1110. The upper frame 1120 comprises a latch 1130 which is configured to releasably engage the frames 1110 and 1120 to a frame of the handle 110. The attachment portion 1100 further comprises housing portions 1140 and a nozzle 1150 attached to the housing portions 1140. The housing portions 1140 comprise one or more grooves and/or one or more walls defined therein which are configured to permit the housing portions 1140 and the nozzle 1150 to rotate—but not translate, or at least substantially translate—relative to the frames 1110 and 1120. Moreover, the housing portions 1140 comprise one or more grooves and/or one or more walls defined therein which are configured to mount the frame assembly 1200 thereto. The frame assembly 1200 is engaged with the housing portions 1140 such that the frame assembly 1200, the housing portions 1140, and the nozzle 1150 are rotatable together about a longitudinal axis 1001 of the shaft assembly 1000.

Referring primarily to FIGS. 1D, 1E, and 1F, the frame assembly 1200 comprises a proximal frame portion 1210, an intermediate frame portion 1220, and a distal frame portion 1230. The frame portions 1210, 1220, and 1230 comprise a rigid, or at least substantially rigid, spine of the shaft assembly 1100. The proximal end of the proximal frame portion 1210 is mounted to a slip joint interface 1260. The slip joint interface 1260 co-operates with a slip joint interface 1160 defined on the lower frame 1110 of the attachment portion 1100 which is configured to permit the frame assembly 1200 to rotate relative to the frames 1110 and 1120, as discussed above. In addition, the slip joint interfaces 1160 and 1260 co-operate to provide an electrical interface which can electrically couple sensors in the end effector, for example, and the attachment portion 1100. The attachment portion 1100 comprises one or more circuits in electrical communication with the slip joint interface 1160 which can be placed in electrical communication with a control module and/or microprocessor of the handle 110, for example, when the shaft assembly 1000 is attached to the handle 110.

Further to the above, referring primarily to FIGS. 1D, 1E, and 1F, the frame assembly 1200 further comprises a spine cover 1250. The spine cover 1250 co-operates with the frame portions 1210, 1220, and 1230 to enclose, or at least substantially enclose, the firing system 1400 therein. The frame assembly 1200 further comprises spacers 1280 which are configured to prevent, or at least limit, relative movement between the frame assembly 1200 and the closure system 1300. Each spacer 1280 comprises one or more pins extending therefrom which extend into apertures defined in the closure system 1300.

Referring primarily to FIGS. 1D, 1E, and 1F, the closure assembly 1300 comprises a closure actuator 1310 that is operably coupled with a closure trigger 130 of the handle 110 when the shaft assembly 1000 is assembled to the handle 110. The closure assembly 1300 further comprises a closure tube 1330 and, in addition, a tube retainer 1320 configured to mount the closure tube 1330 to the closure actuator 1310. More specifically, the tube retainer 1320 mounts the closure tube 1330 to the closure retainer 1310 such that the closure retainer 1310 can push the closure tube 1330 distally and pull the closure tube 1330 proximally. Referring primarily to FIG. 1E, the closure assembly 1300 further comprises a distal closure tube 1340 which is rotatably coupled to the closure tube 1330 via articulation links 1350. When the closure tube 1330 is pushed distally by the closure actuator 1310, the closure tube 1330 pushes the distal closure tube 1340 into engagement with the anvil jaw 2030 and moves the anvil jaw 2030 toward the cartridge jaw 2020. When the closure tube 1330 is pulled proximally by the closure actuator 1310, the distal closure tube 1340 can disengage from the anvil jaw 2030 which can allow the anvil jaw 2030 to be opened. In other instances, the distal closure tube 1340 can pull the anvil jaw 2030 into an open, or an at least partially open, position when the distal closure tube 1340 is retracted.

Referring primarily to FIGS. 1D, 1E, and 1F, the firing assembly 1400 comprises a proximal firing rod 1410 that is operably engaged with a firing system of the handle 110 when the shaft assembly 1000 is assembled to the handle 110. The firing assembly 1400 further comprises an intermediate firing rod 1420 coupled to the proximal firing rod 1410 and, in addition, a firing bar 1430 coupled to the intermediate firing rod 1420. The firing bar 1430 is comprised of a plurality of flexible layers, but can comprise any suitable configuration. The firing assembly 1400 further comprises a coupling member 1440 mounted to the firing bar 1430. When the firing assembly 1400 is advanced distally by the firing system of the handle 110, the coupling member 1440 pushes a sled 2015 of the staple cartridge 2010 distally to eject the staples from the staple cartridge 2010 and into tissue captured between the staple cartridge 2010 and the anvil jaw 2030. The coupling member 1440 also comprises a cutting edge which incises the tissue as the coupling member 1440 is advanced distally to eject the staples.

Further to the above, referring to FIGS. 1F and 1I, the shaft assembly 1000 further comprises a frame pin 1240. The frame pin 1240 couples the frame assembly 1200 and the firing assembly 1400 together such that they can rotate in unison about the longitudinal axis 1001 when the nozzle 1150 is rotated about the longitudinal axis 1001, as discussed above. Referring primarily to FIG. 1I, the frame pin 1240 extends through, and is snugly positioned within, an aperture 1222 defined in the intermediate frame portion 1220. The frame pin 1240 also comprises projections 1242 which extend into apertures 1212 defined in the proximal frame portion 1210. Similar to the above, the projections 1242 are snugly positioned in the apertures 1212. In addition, the frame pin 1240 also comprises a slot 1244 defined therein. The proximal firing rod 1410 extends through the slot 1244 and slides relative to the frame pin 1240 when the proximal firing rod 1410 is moved proximally and distally, as discussed above. The sidewalls of the slot 1244 are spaced apart from one another in order to closely receive the lateral sides 1412 of the proximal firing rod 1410 therebetween. As a result, the frame pin 1240 can transfer the rotation of the frame assembly 1200 to the firing assembly 1400 when the frame assembly 1200 is rotated about the longitudinal axis 1001, as discussed above. Referring primarily to FIG. 1F, the closure tube 1330 can also comprise a clearance aperture 1332 defined therein which is configured to receive a portion of the frame pin 1240 therein.

Referring primarily to FIGS. 1E, 1F, 1G, and 1H, the shaft assembly 1000 further comprises an articulation system 1500 configured to articulate the end effector about the articulation joint 1700. The articulation system 1500 comprises an articulation driver 1510 mounted to the proximal firing rod 1410 and, in addition, an articulation bar 1520 which is selectively engageable with the articulation driver 1510. When the articulation bar 1520 is engaged with the articulation driver 1510, the movement of the proximal firing rod 1410 is transmitted to the articulation bar 1520. In such instances, the shaft assembly 1000 is in an articulation operating mode. When the articulation bar 1520 is not engaged with the articulation driver 1510, the movement of the proximal firing rod 1410 is not transmitted to the articulation bar 1520. In such instances, the shaft assembly 1000 is in a firing operating mode. As a result of the above, the movement of the firing assembly 1400 is selectively transferable to the articulation system 1500. As discussed in greater detail below, the shaft assembly 1000 further comprises a switching system 1600 configured to switch the shaft assembly 1000 between its articulation operating mode and its firing operating mode.

Referring primarily to FIGS. 1C and 1F, the switching system 1600 comprises a shift collar 1610 and a shift plate 1620. The shift collar 1610 is rotatable about the longitudinal axis 1001 of the shaft assembly 1000 between an unactuated position and an actuated position. The closure assembly 1300 is configured to drive the switching system 1600 and rotate the shift collar 1610 from its unactuated position to its actuated position when the closure assembly 1300 is advanced distally to close the anvil jaw 2030. The shift collar 1610 is configured to drive the shift plate 1620 longitudinally from a first position to a second position when the shift collar 1610 is moved from its unactuated position to its actuated position. When the shift plate 1620 is in its first position, the articulation bar 1520 is operably engaged with the proximal firing rod 1410 and the shaft assembly 1000 is in its articulation operating mode. In such instances, the proximal and distal movement of the firing assembly 1400 is transferred to the articulation assembly 1500. When the shift plate 1620 is moved into its second position, the shift plate 1620 operably decouples the articulation bar 1520 from the proximal firing rod 1410 and the shaft assembly 1000 is in its firing operating mode. In such instances, the proximal and distal movement of the firing assembly 1400 is not transferred to the articulation assembly 1500.

When the closure assembly 1300 is pulled proximally to disengage the distal closure tube 1340 from the anvil jaw 2030, further to the above, the shift collar 1610 can be rotated back into its unactuated position. Referring again to FIG. 1F, the switching system 1600 further comprises a biasing member, or spring, 1630 configured to bias the shift collar 1610 into its unactuated position.

Referring primarily to FIGS. 1G and 1H, the articulation system 1500 further comprises an articulation assembly 1530 fixedly mounted to the distal frame portion 1230. The articulation assembly 1530 comprises an articulation frame 1540 and, in addition, a lock system 1550 slidably mounted to the articulation frame 1540. The lock system 1550 is slidable in a distal direction to allow the end effector to be rotated about the articulation joint 1700 in a first direction. The lock system 1550 is also slidable in a proximal direction to allow the end effector to be rotated about the articulation joint 1700 in a second direction. The articulation bar 1520 is operably engaged with the lock system 1550 such that the articulation bar 1520 can push the lock system 1550 distally when the articulation bar 1520 is pushed distally by the proximal firing rod 1410. Moreover, the articulation bar 1520 is operably engaged with the lock system 1550 such that the articulation bar 1520 can pull the lock system 1550 proximally when the articulation bar 1520 is pulled proximally by the proximal firing rod 1410.

Further to the above, the articulation assembly 1530 further comprises an articulation link 1560. Similar to the lock system 1550, the articulation bar 1520 is configured to push the articulation link 1560 distally when the articulation bar 1520 is pushed distally and, correspondingly, configured to pull the articulation link 1560 proximally when the articulation bar 1520 is pulled proximally. The distal end of the articulation link 1560 is engaged with a channel retainer 1570 fixedly mounted in the cartridge jaw 1220. More specifically, the channel retainer 1570 comprises a pin extending therefrom which is positioned within an aperture defined in the articulation link 1560. When the articulation link 1560 is pushed distally, further to the above, the articulation link 1560 drives the end effector in its first direction. When the articulation link 1560 is pulled proximally, the articulation link 1560 drives the end effector in a second, or opposite, direction, as illustrated in FIG. 1H.

The articulation assembly 1530, further to the above, is configured and arranged such that it prevents the rotation of the end effector about the articulation joint 1700 when the lock system 1550 is in a neutral, or unpushed, state. When the lock system 1550 is pushed distally or pulled proximally by the articulation bar 1520, the articulation assembly 1530 is unlocked so that the end effector can be rotated about the articulation joint 1700. In order to relock the end effector in position, the articulation bar 1520 can be used to re-position the lock system 1550 in its neutral state and/or allow a biasing member to re-position the lock system 1550 in its neutral state.

Referring again to FIGS. 1G and 1H, the shaft assembly 1000 further comprises a knife guide 1450 positioned within and/or adjacent to the articulation joint 1700. The knife guide 1450 is configured to support the firing bar 1430 when the end effector is in an articulated configuration, as illustrated in FIG. 1H, among other configurations. The knife guide 1450 comprises lateral sidewalls 1454 defined therein which are configured to support and/or guide the layers of the firing bar 1430—especially when the firing bar 1430 is moved proximally and distally, as described above. The knife guide 1450 is configured to rotate within the articulation joint 1700 when the end effector is rotated. More specifically, the knife guide 1450 rotates in a first direction when the end effector is rotated in a first direction and, correspondingly, the knife guide 1450 rotates in a second direction when the end effector is rotated in a second direction. The distal end 1456 of the knife guide 1450 comprises a post extending therefrom which is positioned in an aperture defined in the channel retainer 1570 which can serve as a pivot joint between the knife guide 1450 and the channel retainer 1570.

Referring primarily to FIGS. 1G and 1H, the shaft assembly 1000 further comprises a cap 1460 engaged with the channel retainer 1570. In at least one instance, the cap 1460 is engaged with the channel retainer 1570 in a snap-fit manner, for example. The cap 1460 is configured to limit the vertical movement of the firing bar 1430 and hold the firing bar 1430 in the knife guide 1450.

Referring again to FIG. 1H, the knife guide 1450 comprises lateral pushers 1452 extending therefrom. The lateral pushers 1452 are configured to push the tissue of a patient out of the articulation joint 1700 when the end effector and the knife guide 1450 are rotated, as described above. Stated another way, the lateral pushers 1452 are configured to push the tissue away from the pinch points between the cartridge jaw 2020 and the frame assembly 1200, for example. Moreover, the lateral pushers 1452 are configured to block, or close, gaps defined between the cartridge jaw 2020 and the frame assembly 1200.

A surgical instrument 2000 is illustrated in FIGS. 1-3 . The surgical instrument 2000 comprises a cartridge jaw 2020 and an anvil jaw 2030. The cartridge jaw 2020 comprises a staple cartridge 2010 which includes a plurality of staples removably stored therein. The staple cartridge 2010 is replaceable and can be removed from the cartridge jaw 2020; however, other embodiments are envisioned in which the staple cartridge 2020 is not replaceable. The staple cartridge 2010 comprises a proximal end 2011, a distal end 2013, and a tissue compression surface 2012 extending between the proximal end 2011 and the distal end 2013. The staple cartridge 2010 further comprises staple cavities defined in the tissue compression surface 2012 and staples removably stored in the staple cavities. The anvil jaw 2030 comprises a proximal end 2031, a distal end 2033, and a tissue compression surface 2032 extending between the proximal end 2031 and the distal end 2033. The anvil jaw 2030 further comprises staple forming pockets defined in the tissue compression surface 2032.

The anvil jaw 2030 is rotatably coupled to the cartridge jaw 2020. Referring to FIG. 2 , the cartridge jaw 2020 comprises apertures 2016 defined on opposite sides thereof. Each aperture 2016 is elongate and extends along a vertical axis 2001. The anvil jaw 2030 comprises projections 2036 that extend laterally therefrom in opposite directions. The projections 2036 are slidably positioned within the apertures 2016. The apertures 2016 and the projections 2036 define a joint about which the anvil jaw 2030 can be rotated relative to the cartridge jaw 2020 between an open position and a closed position. The projections 2036 are closely received between the vertical sidewalls of the apertures 2016 such that proximal and/or distal longitudinal movement of the anvil jaw 2030 relative to the cartridge jaw 2020 is prevented, or at least inhibited. That said, the projections 2036 are movable vertically within the apertures 2016, as described in greater detail further below. In some embodiments, an anvil jaw may comprise a pivot pin about which the anvil jaw is rotatable relative to a cartridge jaw between an open position and a fully-closed position.

Further to the above, the surgical instrument 2000 comprises a closure member, or tube, 2040 configured to contact the anvil jaw 2030 and move the anvil jaw 2030 from its open position toward its closed position (FIG. 3 ) during a closure stroke. More specifically, the closure tube 2040 comprises a distal tube end 2045 configured to engage a cam surface 2035 defined on the anvil jaw 2030 and rotate the distal end 2033 of the anvil jaw 2030 toward the distal end 2013 of the staple cartridge 2010. The closure tube 2040 slides distally along the cam surface 2035 until the distal tube end 2045 comes into contact with a push shoulder 2037 defined on the anvil jaw 2030. In such instances, the projections 2036 rotate within the apertures 2016 as the anvil jaw 2030 is rotating relative to the cartridge jaw 2020.

Referring primarily to FIG. 3 , the rotation of the anvil jaw 2030, without more, may result in the tissue gap between the distal end 2013 of the staple cartridge 2010 and the distal end 2033 of the anvil jaw 2030 (DTG) being larger than the tissue gap between the proximal end 2011 of the staple cartridge 2010 and the proximal end 2031 of the anvil jaw 2030 (PTG). When the distal tissue gap DTG is larger than the proximal tissue gap PTG, the tissue captured within the distal tissue gap DTG may experience less clamping force, or compression, than the tissue captured within the proximal tissue gap PTG. Moreover, in such instances, the tissue compression surface 2032 of the anvil jaw 2030 may not be parallel to the tissue compression surface 2012 of the staple cartridge 2010 and, as a result, the staples deformed by the distal end 2033 of the anvil jaw 2030 may be larger than the staples deformed by the proximal end 2031.

Further to the above, the closure tube 2040 further comprises one or more lift cams 2046 configured to move the distal end 2033 of the anvil jaw 2030 closer to the distal end 2013 of the staple cartridge 2010. The lift cams 2046 of the closure tube 2040 are configured to engage the projections 2036 of the anvil jaw 2030 and push the projections 2036 upwardly within the apertures 2016 during the closure stroke of the closure tube 2040. In such instances, the lift cams 2046 can drive the distal end 2033 of the anvil jaw 2030 toward the distal end 2013 of the staple cartridge 2010 and increase the clamping force applied to the tissue captured within the distal tissue gap DTG. In various instances, the lift cams 2046 can position the anvil jaw 2030 relative to the staple cartridge 2010 such that the distal tissue gap DTG is the same, or at least substantially the same, as the proximal tissue gap PTG; however, the reader should understand that the thickness of the tissue captured between the tissue compression surfaces 2012 and 2032 can affect the distal tissue gap DTG and the proximal tissue gap PTG. In any event, the clamping force applied to the tissue in distal tissue gap DTG can be the same, or at least substantially the same, as the clamping force applied to the tissue in the proximal tissue gap PTG.

In various instances, further to the above, the tissue captured within the distal tissue gap DTG can be pushed out of the distal tissue gap DTG when the tissue is being incised by a cutting member. In at least one instance, the lift cams 2046 can position the anvil jaw 2030 relative to the staple cartridge 2010 such that the distal tissue gap DTG is smaller than the proximal tissue gap PTG. In such instances, the clamping force applied to the tissue in distal tissue gap DTG can be larger than the clamping force applied to the tissue in the proximal tissue gap PTG. As a result, the tissue captured in the DTG is less likely to be pushed out of the distal tissue gap DTG.

In at least one sense, further to the above, the distal tube end 2045 of the closure tube 2040 comprises a first, or initial, cam and the lift cams 2046 of the closure tube 2040 comprise a second, or subsequent, cam. That said, the lift cams 2046 can be configured to engage the projections 2036 at any suitable point in the closure stroke. In at least one instance, the lift cams 2046 are configured to engage the projections 2036 at the same time that the distal tube end 2045 engages the push shoulder 2037. In such instances, the distal end 2033 of the anvil jaw 2030 can be pushed downwardly toward the distal end 2013 of the staple cartridge 2010 at the end of the closure stroke. In other instances, the lift cams 2046 are configured to engage the projections 2036 before the distal tube end 2045 engages the push shoulder 2037. In such instances, the distal end 2033 of the anvil jaw 2030 can be cambered downwardly as the anvil jaw 2030 is being closed. In some instances, the lift cams 2046 are configured to engage the projections 2036 after the distal tube end 2045 has engaged the push shoulder 2037. In such instances, the closure tube 2040 can apply a significant clamping force to the tissue at the very end of the closure stroke which includes, one, a push-to-close force component from the distal tube end 2045 and, two, a lift-to-close force component from the lift cams 2046.

As discussed above, referring again to FIG. 3 , the lift cams 2046 are configured to affect, or close, the distal tissue gap DTG during the closure stroke of the closure tube 2040. The lift cams 2046 do not affect, or at least substantially affect, the proximal tissue gap PTG. In various instances, the tissue positioned in the proximal tissue gap PTG can act as a fulcrum about which the anvil jaw 2030 is rotated when the lift cams 2046 engage the anvil projections 2036. In certain instances, the proximal tissue gap PTG can adjust to the thickness of the tissue captured between the anvil compression surface 2032 and the cartridge compression surface 2012.

Referring again to FIG. 1 , the anvil jaw 2030 comprises a longitudinal slot 2038 which is configured to receive a portion of a firing assembly, or a cutting member portion of the firing assembly, during a tissue cutting stroke. As described in greater detail below, a firing assembly can comprise a cam member configured to engage the anvil jaw 2030 and position the anvil jaw 2030 relative to the staple cartridge 2010 during the tissue cutting stroke. The longitudinal slot 2038 comprises a cam surface 2039 which is engaged by the firing assembly to compress the tissue, or control the compression of the tissue, captured between the cartridge compression surface 2012 and the anvil compression surface 2032. The cam surface 2039 of the anvil jaw 2030 is parallel to the tissue compression surface 2032. In other embodiments, the cam surface 2039 is not parallel to the tissue compression surface 2032. In at least one such embodiment, the cam surface 2039 extends along a plane which is not parallel to a plane including the tissue compression surface 2032. For instance, the distance between the cam surface 2039 and the tissue compression surface 2032 can be larger at the distal end 2033 of the anvil jaw 2030 as compared to the proximal end 2031. In such instances, the compression force applied to the tissue by the firing assembly can increase as the cutting member portion is progressed through its tissue cutting stroke which can prevent, or at least reduce the possibility of, the tissue being pushed out of the distal tissue gap DTG, for example.

In various instances, further to the above, the cam surface 2039 of the anvil jaw 2030 can be pointed downwardly toward the distal end 2013 of the cartridge jaw 2010 when the anvil jaw 2030 has reached its fully-closed position.

A surgical instrument 2100 is illustrated in FIGS. 4 and 5 . The surgical instrument 2100 is similar to the surgical instrument 2000 in many respects. The surgical instrument 2100 comprises a cartridge jaw 2120 and an anvil jaw 2030. The cartridge jaw 2120 comprises a staple cartridge 2010 which includes a plurality of staples removably stored therein. The staple cartridge 2010 is replaceable and can be removed from the cartridge jaw 2120; however, other embodiments are envisioned in which the staple cartridge 2010 is not replaceable. Similar to the above, the anvil jaw 2030 is rotatably coupled to the cartridge jaw 2120. The cartridge jaw 2120 comprises apertures 2116 defined on opposite sides thereof. Each aperture 2116 is elongate and extends along a vertical axis 2001.

Also similar to the above, the anvil jaw 2030 comprises projections 2036 that extend laterally therefrom in opposite directions. The projections 2036 are slidably positioned within the apertures 2116. The apertures 2116 and the projections 2036 define a joint about which the anvil jaw 2030 can be rotated relative to the cartridge jaw 2120 between an open position and a closed position. The projections 2036 are closely received between the vertical sidewalls of the apertures 2116 such that longitudinal proximal and/or distal movement of the anvil jaw 2030 relative to the cartridge jaw 2120 is prevented, or at least inhibited. That said, the projections 2036 are movable vertically within the apertures 2116. As illustrated in FIGS. 4 and 5 , the cartridge jaw 2120 further comprises longitudinal slots 2117 defined on opposite sides thereof. Each longitudinal slot 2117 intersects a bottom portion of an aperture 2116.

Further to the above, the surgical instrument 2100 comprises a closure member, or tube, 2040 configured to contact the anvil jaw 2030 and move the anvil jaw 2030 from its open position (FIG. 4 ) toward its closed position (FIG. 5 ) during a closure stroke. More specifically, further to the above, the distal tube end 2045 of the closure tube 2040 is configured to engage a cam surface 2035 defined on the anvil jaw 2030 and rotate the anvil jaw 2030 toward the cartridge jaw 2120. The closure tube 2040 slides distally along the cam surface 2035 until the distal tube end 2045 comes into contact with a push shoulder 2037 defined on the anvil jaw 2030. In such instances, the projections 2036 rotate within the apertures 2116 as the anvil jaw 2030 is rotating relative to the cartridge jaw 2120.

Further to the above, the lift cams 2046 of the closure tube 2040 are configured to engage the projections 2036 of the anvil jaw 2030 and push the projections 2036 upwardly within the apertures 2116 during the closure stroke of the closure tube 2040. In such instances, the lift cams 2046 can drive the distal tip of the anvil jaw 2030 toward the distal tip of the cartridge jaw 2120 and increase the clamping force applied to the tissue captured between the distal tips of the cartridge jaw 2120 and the anvil jaw 2030. The movement of the lift cams 2046 is limited to a longitudinal path defined by the longitudinal slots 2117. In at least one instance, the longitudinal path comprises a longitudinal axis which is orthogonal, or at least substantially orthogonal, to the vertical axis 2001, for example. The intersection of the longitudinal slots 2117 and the apertures 2116 allows the lift cams 2046 to engage the projections 2036 as the closure tube 2040 is advanced distally during its closure stroke.

As discussed above, the surgical instruments 2000 and 2100 comprise a fixed cartridge jaw and a movable anvil jaw. However, other embodiments are envisioned. For instance, a surgical instrument can comprise a fixed anvil jaw and a movable cartridge jaw. Such embodiments can be useful when the space between the targeted tissue and a body cavity wall is limited, for example. More specifically, in various instances, the anvil jaw 2030 is thinner than the staple cartridge jaw 2020 and, if the anvil jaw 2030 is fixed, the anvil jaw 2030 could provide a thin, but stiff, jaw that could be slid behind tissue in tight spaces.

A surgical instrument 2200 is illustrated in FIGS. 6-8 . The surgical instrument 2200 is similar to the surgical instruments 2000 and 2100 in many respects. The surgical instrument 2200 comprises a cartridge jaw 2220 and an anvil jaw 2230 rotatably coupled to the cartridge jaw 2220. The cartridge jaw 2220 comprises a replaceable staple cartridge 2210 including a plurality of staples removably stored therein. In other embodiments, the staple cartridge 2210 is not removable from the cartridge jaw 2220. The cartridge jaw 2220 and the anvil jaw 2230 are similar to the cartridge jaw 2020 and the anvil jaw 2030, respectively. The surgical instrument 2200 further comprises a closure tube 2240. The closure tube 2240 is similar to the closure tube 2040 in many respects. Among other things, the closure tube 2240 comprises a distal tube end 2245 configured to engage a cam surface 2035 and/or a push shoulder 2037 on the anvil jaw 2230 to rotate the anvil jaw 2230 toward the cartridge jaw 2220.

The surgical instrument 2200 further comprises a firing assembly 2250. The firing assembly 2250 comprises a coupling member 2251, a firing bar 2254 mounted to the coupling member 2251, and a firing rod 2252. The coupling member 2251 is configured to be advanced distally from a proximal unfired position to a distal fired position by the firing rod 2252 and the firing bar 2254 during a firing stroke of the firing assembly 2250 to eject the staples from the staple cartridge 2210. The coupling member 2251 comprises a first cam configured to engage the cartridge jaw 2220 and a second cam configured to engage the anvil jaw 2230 during the firing stroke. Among other things, the first and second cams lock the anvil jaw 2230 in a closed position during the firing stroke. After at least a portion of the firing stroke has been completed, the firing assembly 2250 can be retracted to disengage the first and second cams from the jaws 2220 and 2230, respectively. At such point, the closure tube 2240 can be retracted proximally to disengage the distal tube end 2245 from the cam surface 2035.

The closure tube 2240 further comprises at least one crimp tab 2249 (FIG. 3 ). The crimp tab 2249 is configured to positively open the anvil jaw 2230. As the closure tube 2240 is being retracted proximally, further to the above, the distal tube end 2245 slides proximally across the cam surface 2035 and, after the closure tube 2240 has been sufficiently retracted, the crimp tab 2249 contacts a cam tab 2239 defined on the anvil jaw 2230. Stated another way, the crimp tab 2249 does not initially engage the cam tab 2239 as the closure tube 2240 is being retracted; rather, the crimp tab 2249 comes into contact with the cam tab 2239 as the closure tube 2240 is being retracted. Once the crimp tab 2249 is engaged with the cam tab 2239, further retraction of the closure tube 2240 will open the anvil jaw 2230. The closure tube 2240 must be sufficiently retracted before the biasing member can open the anvil jaw 2230. As a result, the anvil jaw 2230 may not open immediately during the retraction stroke of the closure tube 2240 absent the use of a resilient biasing feature which can drive the anvil jaw 2230 into an at least partially open position while the closure tube 2240 is being retracted, as discussed in greater detail below.

Further to the above, the firing assembly 2250 comprises a biasing member, or spring, 2256, for example, positioned intermediate the firing rod 2252 and a proximal tail 2255 of the firing bar 2254. Referring primarily to FIG. 6 , the spring 2256 comprises an end securely mounted in a recess 2257 defined in the distal end of the firing rod 2252 and, in addition, a cantilever end 2258 which extends into a longitudinal opening 2253 defined in the firing rod 2252. When the firing assembly 2250 is retracted, as illustrated in FIG. 7 , the firing rod 2252 applies a retraction force to the firing bar 2254 via the spring 2256. This retraction force resiliently compresses the spring 2256, as also illustrated in FIG. 7 . As the firing assembly 2250 is retracted, the coupling member 2251 comes into contact with the anvil jaw 2230. More specifically, a shoulder 2259 defined on the coupling member 2251 contacts the cam tab 2239 defined on the anvil jaw 2230. At such point, the spring 2256 is still in its compressed state and is applying a load to the anvil jaw 2230 through the coupling member 2251. This load, however, does not open the anvil jaw 2230 until the closure tube 2240 is moved proximally away from the push shoulder 2037. Once the closure tube 2240 begins its opening motion, however, the load can quickly open, or at least partially open, the anvil jaw 2230, as illustrated in FIG. 8 . In various instances, as a result, very little, if any, lag exists between the opening motion of the closure tube 2240 and the opening motion of the anvil jaw 2230.

Further to the above, the spring 2256 will apply the quick-opening force to the anvil jaw 2230 so long as the spring 2256 is resiliently compressed between the firing rod 2252 and the firing bar 2254. Once the spring 2256 has returned to its uncompressed state, the firing assembly 2250 may no longer apply an opening force to the anvil jaw 2230. Further opening of the anvil jaw 2230 can be accomplished through retraction of the closure system so that the positive jaw opening crimp tab 2249 applies force to the cam tab 2239 to fully open the anvil jaw 2230.

A coupling member 2551 is illustrated in FIGS. 9-11 and a portion of a firing assembly 2550 is illustrated in FIG. 10 . The coupling member 2551 comprises a first cam 2552 configured to engage a first jaw and second cams 2553 configured to engage a second jaw. The coupling member 2551 further comprises a recess 2555 defined therein. The recess 2555 is configured to receive a firing bar 2554 therein. In at least one instance, the lateral side of the firing bar 2554 is flush with the lateral side of the coupling member 2551 when the firing bar 2554 is fully seated in the coupling member 2551. In other instances, the lateral side of the firing bar 2554 is recessed with respect to the lateral side of the coupling member 2551.

Further to the above, the firing bar 2554 comprises a plurality of flexible layers. Each of the layers is mounted to the coupling member 2551. The coupling member 2551 comprises a first, or proximal, mounting post, or projection, 2557 p and a second, or distal, mounting post, or projection, 2557 d. Each layer of the firing bar 2554 comprises an aperture 2558 p configured to closely receive the mounting post 2557 p. In at least one instance, the mounting post 2557 p is press fit into the apertures 2558 p such that little, if any, relative movement is possible between the firing bar 2554 and the mounting post 2557 p. Similarly, each layer of the firing bar 2554 comprises an aperture 2558 d configured to closely receive the mounting post 2557 d. In at least one instance, the mounting post 2557 d is press fit into the apertures 2558 d such that little, if any, relative movement is possible between the firing bar 2554 and the mounting post 2557 d. Mounting posts 2557 p and 2557 d provide, one, a mechanical attachment of the coupling member 2551 to the firing bar 2554 and, two, surfaces which extend out to the exterior surface of the firing bar 2554 that provide significant exposed surface area that allows a welded connection to be made between the coupling member 2551 and the firing bar 2554. In various instances, the perimeters of the mounting posts 2557 p and 2557 d are welded to the layers, or at least the outer layer, of the firing bar 2554. In some instances, the ends of the mounting posts 2557 p and 2557 d are entirely welded over to make the connection between the coupling member 2551 and the firing bar 2554.

The mounting post 2557 p and the mounting post 2557 d are not aligned longitudinally. Referring primarily to FIG. 9 , the mounting posts 2557 p and 2557 d are positioned on opposite sides of a longitudinal axis 2558. The longitudinal axis 2558 is collinear with and/or parallel to the longitudinal path of the firing assembly 2550. As a result of the above, the interconnection between the coupling member 2251 and the firing bar 2554 can withstand torque loads which act to rotate the coupling member 2551 upwardly and/or downwardly. In alternative embodiments, the mounting posts 2557 p and 2557 d are aligned longitudinally. In such instances, the mounting posts 2557 p and 2557 d can comprise an alignment datum for properly orienting the coupling member 2551 relative to the firing bar 2554.

Referring primarily to FIG. 10 , the firing assembly 2550 comprises a cutting portion configured to cut the tissue of a patient as the firing assembly 2550 is advanced distally through a staple cartridge. The coupling member 2551 comprises a first cutting part 2556′ of the cutting portion and the firing bar 2554 comprises a second cutting part 2556″ of the cutting portion. The first cutting part 2556′ is positioned laterally with respect to the second cutting part 2556″. The face of the first cutting part 2556′, however, is aligned with the face of the second cutting part 2556″ such that these faces comprise a continuous, or at least substantially continuous, cutting edge, as illustrated in FIG. 10 . In at least one instance, only one layer of the firing bar 2554 constitutes the second cutting part 2556″; however, alternative embodiments are envisioned in which more than one layer of the firing bar 2554 constitutes the second cutting part 2556″. In certain embodiments, the coupling member 2551 does not constitute part of the cutting portion. In at least one such embodiment, the firing bar 2554 comprises the entirety of the cutting portion. In any event, the arrangements discussed above can reduce the cost of creating the firing assembly 2250 by eliminating the need to sharpen and hone the coupling member 2251, and transferring the sharpening operation to one of the flat layers of the firing bar 2554.

A coupling member 2651 is illustrated in FIG. 12 , a portion of a firing bar 2654 is illustrated in FIG. 13 , and a portion of a firing assembly 2650 comprising the coupling member 2651 and the firing bar 2654 is illustrated in FIG. 14 . The coupling member 2651 comprises a first cam 2552 configured to engage a first jaw and second cams 2553 configured to engage a second jaw. Referring to FIG. 12 , the coupling member 2651 further comprises a recess 2655 defined therein. The recess 2655 is configured to receive the firing bar 2654 therein, as illustrated in FIG. 14 . In at least one instance, the lateral side of the firing bar 2654 is flush with the lateral side of the coupling member 2651 when the firing bar 2654 is fully seated in the recess 2655. In other instances, the lateral side of the firing bar 2654 is recessed with respect to the lateral side of the coupling member 2651.

Referring primarily to FIG. 12 , the coupling member 2651 comprises a proximal mounting post 2657 p and a distal mounting post 2657 d. The firing bar 2654, referring to FIG. 13 , comprises a proximal aperture 2658 p configured to closely receive the mounting post 2657 p. In at least one instance, the mounting post 2657 p is press-fit within the proximal aperture 2658 p of the firing bar 2654. The firing bar 2654 further comprises a distal aperture 2658 d configured to closely receive the distal mounting post 2657 d of the coupling member 2651. In at least one instance, the mounting post 2657 d is press-fit within the distal aperture 2658 d of the firing bar 2654. Mounting posts 2657 p and 2657 d provide, one, a mechanical attachment of the coupling member 2651 to the firing bar 2654 and, two, surfaces which extend out to the exterior surface of the firing bar 2654 that provide significant exposed surface area that allows a welded connection to be made between the coupling member 2651 and the firing bar 2654. In various instances, the perimeters of the mounting posts 2657 p and 2657 d are welded to the layers, or at least the outer layer, of the firing bar 2654. In some instances, the ends of the mounting posts 2657 p and 2657 d are entirely welded over to make the connection between the coupling member 2651 and the firing bar 2654.

Referring again to FIG. 13 , the firing bar 2654 further comprises a hook, or catch, 2653. Referring now to FIG. 14 , the hook 2653 is engaged with the coupling member 2651. More specifically, the hook 2653 is at least partially wrapped around the distal end of a second cam 2553. In various instances, the hook 2653 can be used to align the firing bar 2654 with the coupling member 2651 before seating the firing bar 2654 into the recess 2655 in the coupling member 2651. Moreover, the hook 2653 extends over the cutting part 2556″ of the coupling member 2651 and can be configured to direct the flow of tissue toward the cutting edge of the cutting part 2556″. The firing bar 2654 comprises a single layer and the hook 2653 is defined on that layer; however, the hook 2653 can be defined on multiple layers in other firing bars. In any event, the hook 2653, the distal aperture 2658 d, and the proximal aperture 2658 p are configured to retain the firing bar 2654 to the coupling member 2651.

As discussed above, the firing bar 2654 is positioned within a lateral recess 2655. Referring to FIG. 12 , the second cam 2553 that extends over the recess 2655 is longer than the other second cam 2553. Moreover, the firing bar 2654 is offset laterally with respect to the center of the coupling member 2651. In use, as a result, the firing bar 2654 can experience a lateral twist when the firing assembly 2650 is being advanced distally during its firing stroke. To account for this twist, in various instances, the second cams 2553 can be closely received within a jaw, such as the anvil jaw 2030, for example. More specifically, referring again to FIG. 1 , the sidewalls of the slot 2038 are configured such that there is little, if any, lateral gap between the sidewalls and the lateral sides of the second cams 2553. Other means can be used.

Turning now to FIGS. 15-18 , a firing assembly 2750 comprises a coupling member 2751 and a firing bar 2754 including multiple layers attached to the coupling member 2751. The coupling member 2751 comprises a first cam 2752 configured to engage a first jaw, second cams 2753 configured to engage a second jaw, and a cutting edge 2756 configured to transect tissue during a firing stroke of the firing assembly 2750. The coupling member 2751 comprises a mounting tab 2754 a extending proximally therefrom and lateral recesses 2755 defined on opposite sides of the mounting tab 2754 a. Referring to FIG. 16 , a center layer 2754 b of the firing bar 2754 is attachable to the mounting tab 2754 a. The mounting tab 2754 a and the center layer 2754 b define apertures 2754 c therebetween which are configured to receive welds 2754 d therein to retain the center layer 2754 b to the mounting tab 2754 a; however, any suitable joining method could be used to join the center layer 2754 b to the mounting tab 2754 a.

Further to the above, referring now to FIG. 17 , the firing bar 2754 further comprises lateral layers 2754 e which are mounted to the coupling member 2751 in the lateral recesses 2755. Each of the lateral layers 2754 e is mounted to the coupling member 2751 via welds 2754 f; however, other joining methods could be used. In various instances, the welds 2754 f are located distally with respect to the welds 2754 d. As a result, the attachment points of the lateral layers 2754 e to the coupling member 2751 are positioned distally with respect to the attachment point of the center layer 2754 b. Due to this longitudinal offset, the welds 2754 d and 2754 f can withstand and transmit torque loads. Moreover, the welds 2754 d and 2754 f are not in the same shear plane and the possibility of the coupling member 2751 becoming detached from the firing bar 2754 is reduced.

As discussed in greater detail below, a firing assembly, or cutting member, can be part of, and/or comprise, a lockout system configured to prevent or limit the distal advancement of the firing assembly in certain instances. Referring again to FIGS. 9 and 10 , the coupling member 2551 of the firing assembly 2550 comprises a distal projection 2559. The distal projection 2559 is part of a lockout arrangement configured to prevent the firing assembly 2550 from being advanced distally in the event that an unspent staple cartridge is not properly positioned in front of the firing assembly 2550. In such instances, the firing assembly 2550 can be pushed downwardly into a locked out state by a biasing member when the firing assembly 2550 is advanced distally in order to prevent the firing assembly 2550 from performing a staple firing stroke. To the extent that an unspent staple cartridge is properly positioned in front of the firing assembly 2550, the distal projection 2559 can be supported by a sled in the staple cartridge which can allow the firing assembly 2550 to complete the staple firing stroke. The entire disclosures of:

-   -   U.S. Pat. No. 7,044,352, entitled SURGICAL STAPLING INSTRUMENT         HAVING A SINGLE LOCKOUT MECHANISM FOR PREVENTION OF FIRING,         which issued on May 16, 2006;     -   U.S. Pat. No. 7,143,923, entitled SURGICAL STAPLING INSTRUMENT         HAVING A FIRING LOCKOUT FOR AN UNCLOSED ANVIL, which issued on         Dec. 5, 2006;     -   U.S. Pat. No. 6,988,649, entitled SURGICAL STAPLING INSTRUMENT         HAVING A SPENT CARTRIDGE LOCKOUT, which issued on Jan. 24, 2006;     -   U.S. Pat. No. 7,000,818, entitled SURGICAL STAPLING INSTRUMENT         HAVING SEPARATE DISTINCT CLOSING AND FIRING SYSTEMS, which         issued on Feb. 21, 2006; and     -   U.S. Pat. No. 6,978,921, entitled SURGICAL STAPLING INSTRUMENT         INCORPORATING AN E-BEAM FIRING MECHANISM, which issued on Dec.         27, 2005, are incorporated by reference herein.

A firing assembly 2350 of a surgical instrument 2300 is illustrated in FIGS. 19-21 . The firing assembly 2350 comprises a coupling member 2351 and a firing bar 2354 mounted to the coupling member 2351. The coupling member 2351 is similar to the coupling member 2551 in many respects. The firing bar 2354 comprises a plurality of layers including central layer 2354 b and lateral layers 2354 e. The surgical instrument 2300 is configured to receive a staple cartridge having a sled stored therein that, during a staple firing stroke, is advanced distally by the firing assembly 2350. The staple cartridge 2010, for example, comprises a cartridge body 2011 and, in addition, a sled 2014 which is movable through the cartridge body 2011 from a proximal, unfired position to a distal, fired position during the staple firing stroke. When the sled 2014 is in its proximal, unfired position, the staple cartridge 2010 is unspent. When the sled 2014 has been moved distally from its proximal, unfired position, the staple cartridge 2010 becomes spent.

The firing assembly 2350 further comprises a lockout system. The lockout system is configured to prevent the firing assembly 2350 from being advanced distally to perform a staple firing stroke if an unspent staple cartridge, such as staple cartridge 2010, for example, is not properly positioned in the surgical instrument 2300, as illustrated in FIG. 20 . In fact, a staple cartridge is entirely missing from the surgical instrument 2300 in FIG. 20 . Correspondingly, the lockout system is configured to permit the firing assembly 2350 to be advanced distally to perform a staple firing stroke if an unspent staple cartridge, such as staple cartridge 2010, for example, is properly positioned in the surgical instrument 2300, as illustrated in FIG. 21 .

Referring primarily to FIG. 19 , the firing assembly 2350 comprises a lockout bar 2360 slidably mounted to the firing bar 2354. The lockout bar 2360 comprises a longitudinal portion 2364 and a distal end 2366. The longitudinal portion 2364 of the lockout bar 2360 extends through a longitudinal clearance slot defined between the lateral layers 2354 e of the firing bar 2354. The distal end 2366 of the lockout bar 2360 extends through an aperture 2359 defined in the coupling member 2351 and projects distally from the coupling member 2351. The lockout bar 2360 is slidable between a distal, or locked, position (FIG. 20 ) and a proximal, or unlocked, position (FIG. 21 ) when an unspent staple cartridge 2010 is properly positioned in the cartridge jaw 2020. More specifically, further to the above, an unspent staple cartridge 2010 comprises a sled 2014 in its proximal, unfired position which contacts the lockout bar 2360 and pushes the lockout bar 2360 proximally when the unspent staple cartridge 2010 is inserted into the cartridge jaw 2020. The sled 2014 is releasably retained to the cartridge body 2011 such that the sled 2014 remains in its proximal, unfired position while pushing the lockout bar 2360 proximally. In at least one instance, the cartridge body 2011 comprises one or more detents which releasably hold the sled 2014 in its proximal, unfired position.

The firing assembly 2350 further comprises a firing rod 2352 having a longitudinal slot 2358 defined therein. The firing bar 2354 comprises a proximal end 2355 positioned in the longitudinal slot 2358 and, similarly, the lockout bar 2360 comprises a proximal end 2365 which is also positioned in the longitudinal slot 2358. When the lockout bar 2360 is in its locked position, as illustrated in FIG. 20 , a lock 2370 is engaged with the firing rod 2352 which prevents the firing rod 2352 from being advanced distally. Correspondingly, in such instances, the lock 2370 prevents the firing rod 2352 from advancing the firing bar 2354, and the coupling member 2351, through a staple firing stroke. The lock 2370 is rotatably mounted to a shaft 2340 of the surgical instrument 2300 about a pivot 2371 and comprises a lock shoulder engaged with a lock recess, or notch, 2378 defined in the firing rod 2352. The lock 2370 is biased into engagement with the firing rod 2352 by a spring 2372.

Upon comparing FIGS. 20 and 21 , further to the above, it can be seen that the lockout bar 2360 moves relative to the firing bar 2354 when the lockout bar 2360 is moved between its locked position (FIG. 20 ) and its unlocked position (FIG. 21 ) when an unspent staple cartridge 2010 is loaded into the surgical instrument 2300. The firing assembly 2350 further comprises a biasing member, or spring, 2368 positioned intermediate the proximal end 2355 of the firing bar 2354 and the proximal end 2365 of the lockout bar 2360 which is compressed between the proximal ends 2355 and 2365 when the lockout bar 2360 is moved proximally. If the unspent staple cartridge 2010 were to be removed from the cartridge jaw 2020 before the staple cartridge 2010 is fired, the biasing member 2368 would resiliently expand and push the lockout bar 2360 distally into its locked position and allow the spring 2372 to return the lock 2370 into its locked position and re-engage the firing rod 2352. Stated another way, the spring 2368 biases the lockout bar 2360 into its locked position in the absence of an unspent staple cartridge in the cartridge jaw 2020.

When the lockout bar 2360 is moved proximally into its unlocked condition, as illustrated in FIG. 21 , the proximal end 2365 of the lockout bar 2360 engages the lock 2370 and rotates the lock 2370 downwardly out of engagement with the firing rod 2352 against the bias of the spring 2372. At such point, the firing assembly 2350 can be advanced distally to perform the staple firing stroke. Notably, the firing rod 2352 pushes the firing bar 2354 distally. More specifically, the proximal sidewall of the longitudinal slot 2358 abuts the proximal end 2355 of the firing bar 2354 as the firing rod 2352 is advanced distally. Also, notably, the firing bar 2354 pushes the lockout bar 2360 distally via the spring 2368. As a result, the lockout bar 2360 travels with the firing bar 2354 when the firing bar 2354 is moved distally during the staple firing stroke.

Further to the above, the distal movement of the firing bar 2354 and the lockout bar 2360 during the staple firing stroke moves the proximal end 2365 of the lockout bar 2360 away from the lock 2370. In such instances, however, the lock recess 2378 defined in the firing rod 2352 is no longer in alignment with the lock 2370. As a result, the lock 2370 cannot re-engage the firing rod 2352 and lock the firing rod 2352 in position even though the lockout bar 2360 has been disengaged from the lock 2370. When the firing rod 2352 is retracted in order to reset the surgical instrument 2300, the firing rod 2352 can pull the firing bar 2354 and the lockout bar 2360 proximally to the position illustrated in FIG. 20 . In such instances, the lock recess 2378 is re-aligned with the lock 2370 such that the spring 2372 can re-engage the lock 2370 with the firing rod 2352 and re-lock the firing assembly 2350 in position. In various instances, the firing rod 2352 further comprises a ramp 2375 configured to deflect the lock 2370 downwardly as the firing rod 2352 is being retracted.

Further to the above, the firing rod 2352 is pulled proximally after a staple firing stroke to retract the firing bar 2354, the lockout bar 2360, and the coupling member 2351 of the firing assembly 2350. Notably, the sled 2014 of the staple cartridge 2010 is not retracted by the firing rod 2352. Instead, the sled 2014 remains in its fired position. As a result, the lockout bar 2360 is pushed out of its locked position when the firing assembly 2350 is returned to its reset position and, as such, the firing assembly 2350 is prevented from being advanced distally once again until the spent staple cartridge 2010 is removed from the cartridge jaw 2020 and an unspent staple cartridge 2010, for example, is properly positioned in the cartridge jaw 2020.

Moreover, further to the above, it should be appreciated that the sled 2014 of a spent staple cartridge 2010 cannot contact the lockout bar 2360 when the spent staple cartridge 2010 is loaded into the cartridge jaw 2020 because the sled 2014 is not in its proximal position and, as a result, the sled 2014 cannot unlock the firing assembly 2350.

A surgical instrument 2900 comprising a firing assembly 2950 is illustrated in FIGS. 22 and 23 . Similar to the above, the firing assembly 2950 comprises a lockout system configured to prevent the firing assembly 2950 from being advanced distally to perform a staple firing stroke without an unspent staple cartridge 2910, for example, properly positioned in the cartridge jaw 2020. In at least one instance, the surgical instrument 2900 can comprise the lock 2370 and lock spring 2372 arrangement discussed above in connection with the surgical instrument 2300, for example, which can block the distal advancement of the firing assembly 2950 when an unspent staple cartridge is not properly seated in the cartridge jaw 2020, as illustrated in FIG. 22 . When an unspent staple cartridge 2910 is properly seated in the cartridge jaw 2020, as illustrated in FIG. 23 , the lockout system can permit the firing assembly 2950 to perform the staple firing stroke. The staple cartridge 2910 is similar to the staple cartridge 2010 in many respects and comprises a cartridge body 2912 and a sled 2916 movable from a proximal, unfired position (FIG. 23 ) to a distal, fired position by the firing assembly 2950 during the staple firing stroke.

The firing assembly 2950 comprises a firing rod 2952, a firing bar 2954, and a coupling member 2951 mounted to the firing bar 2954. The coupling member 2951 is similar to the coupling member 2551 in many respects. The firing bar 2954 comprises a proximal portion 2955 slidably positioned in a longitudinal slot 2958 defined in the firing rod 2952. The firing assembly 2950 further comprises a biasing member, or compression spring, 2966 positioned in the longitudinal slot 2958 intermediate the proximal portion 2955 of the firing bar 2954 and the firing rod 2952. When an unspent staple cartridge 2910 is not positioned in the cartridge jaw 2020, as illustrated in FIG. 22 , the spring 2966 is configured to bias the firing bar 2954 forward. In this forward position of the firing bar 2954, a key 2965 of the firing bar 2954 is not engaged with the lock 2370 and, as a result, the spring 2372 biases the lock 2370 into the lock recess 2378 defined in the firing rod 2952 which prevents the firing rod 2952 from being advanced distally to perform a staple firing stroke.

When an unspent staple cartridge 2910 is properly positioned in the cartridge jaw 2020, as illustrated in FIG. 23 , the sled 2916 directly contacts the coupling member 2951 and pushes the firing bar 2954 proximally into its unlocked position. In this proximal position of the firing bar 2954, the key 2965 of the firing bar 2954 is engaged with the lock 2370 and holds the lock 2370 out of the lock notch 2378 in the firing rod 2952. In such instances, as a result, the firing rod 2952 can be advanced distally to push the firing bar 2954, the coupling member 2951, and the sled 2916 through the staple firing stroke. Similar to the above, the firing rod 2952 can be retracted to pull the firing bar 2954 and the coupling member 2951 proximally to reset the surgical instrument 2900. Also similar to the above, the sled 2916 is not retracted with the firing assembly 2950 and, as a result, the firing bar 2954 is in its forward, or locked, position after the firing assembly 2950 has been retracted. The reader should appreciate that the spent staple cartridge 2910 must be replaced with an unspent staple cartridge 2910 to unlock the lock 2370 from the firing assembly 2950 and use the surgical instrument 2900 once again.

A surgical instrument 3000 comprising a shaft 3040 and a firing assembly 3050 is illustrated in FIGS. 24 and 25 . Similar to the above, the firing assembly 3050 comprises a lockout system configured to prevent the firing assembly 3050 from being advanced distally to perform a staple firing stroke without an unspent staple cartridge 3010, for example, properly positioned in the cartridge jaw 2020. The surgical instrument 3000 comprises a lock 3070 in the shaft 3040 which, similar to lock 2370, can block the distal advancement of the firing assembly 3050, as illustrated in FIG. 24 . When an unspent staple cartridge 3010 is properly seated in the cartridge jaw 2020, as illustrated in FIG. 25 , the lockout system can permit the firing assembly 3050 to perform the staple firing stroke. The staple cartridge 3010 is similar to the staple cartridge 2010 in many respects and comprises a cartridge body 3012 and a sled 3016 movable from a proximal, unfired position (FIG. 25 ) to a distal, fired position by the firing assembly 3050 during the staple firing stroke.

The firing assembly 3050 comprises a firing rod 3052, a firing bar 3054, and a coupling member 2951 mounted to the firing bar 3054. The firing bar 3054 comprises a proximal portion 3055 slidably positioned in a longitudinal slot 3058 defined in the firing rod 3052. The firing assembly 3050 further comprises a biasing member, or compression spring, 3066 positioned in the longitudinal slot 3058 intermediate the firing rod 3052 and proximal portion 3055 of the firing bar 3054. When an unspent staple cartridge 3010 is not positioned in the cartridge jaw 2020, as illustrated in FIG. 24 , the spring 3066 is configured to bias the firing bar 3054 forward. In this forward position of the firing bar 3054, a leaf spring 3072 biases the lock 3070 into the lock notch 2378 defined in the firing rod 3052 which prevents the firing rod 3052 from being advanced distally to perform a staple firing stroke.

When an unspent staple cartridge 3010 is positioned in the cartridge jaw 2020, as illustrated in FIG. 25 , the sled 3016 directly contacts the coupling member 2951 and pushes the firing bar 3054 proximally into its unlocked position. In this proximal position of the firing bar 3054, the proximal end 3055 of the firing bar 3054 is engaged with the lock 3070 and holds the lock 3070 out of the lock notch 2378 in the firing rod 3052 against the biasing force of the leaf spring 3072. In such instances, as a result, the firing rod 3052 can be advanced distally to push the firing bar 3054, the coupling member 2951, and the sled 3016 through the staple firing stroke. Similar to the above, the firing rod 3052 can be retracted to pull the firing bar 3054 and the coupling member 2951 proximally to reset the surgical instrument 3000. Also similar to the above, the sled 3016 is not retracted with the firing assembly 3050 and, as a result, the firing bar 3054 is in its forward, or locked, position after the firing assembly 3050 has been retracted. The reader should appreciate that the spent staple cartridge 3010 must be replaced with an unspent staple cartridge 3010 to unlock the lock 3070 from the firing assembly 3050 and use the surgical instrument 3000 once again.

As discussed above, the lock 2370 is positioned in the shafts of the surgical instruments 2900 and 3000; however, the lock 2370 can be placed in any suitable location. In various instances, the surgical instrument 2900 and/or 3000, for example, can comprise an articulation joint about which an end effector, including the jaws 2020 and 2030, can be articulated. In at least one instance, the lock 2370 is positioned distally with respect to the articulation joint. In such instances, the lockout system is unaffected by the articulation joint. In other instances, the lock 2370 is positioned proximally with respect to the articulation joint. Placing the lock 2370 in such a position can shorten the portion of the surgical instrument which is distal to the articulation joint and improve the accessibility of the surgical instrument into a small surgical site, for instance.

As discussed above, a firing assembly of a surgical instrument can be advanced distally through a staple cartridge to eject the staples from the staple cartridge during a staple firing stroke. As also discussed above, the staple cartridge can comprise a sled which is pushed distally by the firing assembly to drive the staples out of the staple cartridge during the staple firing stroke. In various instances, however, a clinician may not be able to observe the progress of the staple firing stroke. Absent such information, the clinician may not know whether the tissue captured within the surgical instrument has been sufficiently stapled.

Turning now to FIGS. 26-30 , a surgical instrument 3100 comprises a cartridge jaw 3120 configured to receive a staple cartridge 3110 therein. The cartridge jaw 3120 comprises a bottom portion and lateral side walls 3122 extending from the bottom portion. The staple cartridge 3110 is positionable between the lateral side walls 3122 of the cartridge jaw 3120. The staple cartridge 3110 and the cartridge jaw 3120 comprise co-operating features configured to align and releasably hold the staple cartridge 3110 in a seated position (FIGS. 27-29 ). The staple cartridge 3110 further comprises a sled 3116 movable between a proximal, unfired position (FIGS. 26 and 27 ) and a distal, fired position (FIG. 29 ) by the firing assembly 2550 during a staple firing stroke.

The cartridge jaw 3120 comprises a series of openings, or windows, defined in a lateral side wall 3122. The windows of the cartridge jaw 3120 comprise a proximal window 3127, a distal window 3129, and an intermediate window 3128 positioned intermediate the proximal window 3127 and the distal window 3129. Each window 3127, 3128, and 3129 comprises an elongate longitudinal through hole positioned along a longitudinal axis 3121; however, the windows 3127, 3128, and 3129 can have any suitable arrangement. In at least one instance, the intermediate window 3128 is positioned at the midpoint between the proximal window 3127 and the distal window 3129. In other instances, the intermediate window 3128 can be positioned at any suitable location between the proximal window 3127 and the distal window 3129. In at least one instance, the cartridge jaw 3120 can comprise more than one intermediate window 3128.

The staple cartridge 3110 comprises a series of openings, or windows, defined in the lateral sides of the cartridge body 3112. The windows of the staple cartridge 3110 comprise a proximal window 3117, a distal window 3119, and an intermediate window 3118 positioned intermediate the proximal window 3117 and the distal window 3119. Each window 3117, 3118, and 3119 comprises an elongate longitudinal through hole positioned along a longitudinal axis 3111; however, the windows 3117, 3118, and 3119 can have any suitable arrangement. In at least one instance, the intermediate window 3118 is positioned at the midpoint between the proximal window 3117 and the distal window 3119. In other instances, the intermediate window 3118 can be positioned at any suitable location between the proximal window 3117 and the distal window 3119. In at least one instance, the staple cartridge 3110 can comprise more than one intermediate window 3118.

When the staple cartridge 3110 is fully seated in the cartridge jaw 3120, the windows in the staple cartridge 3110 are aligned with the windows in the cartridge jaw 3120. More specifically, the proximal cartridge window 3117 is aligned with the proximal jaw window 3127, the intermediate cartridge window 3118 is aligned with the intermediate jaw window 3128, and the distal cartridge window 3119 is aligned with the distal jaw window 3129. In such instances, the windows 3117 and 3127 form a first pair of aligned apertures, the windows 3118 and 3128 form a second pair of aligned apertures, and the windows 3119 and 3129 form a third pair of aligned apertures. As a result, a clinician can look into the staple cartridge 3110 through the cartridge jaw 3120 at three distinct locations.

Further to the above, the staple cartridge 3110 engages the cartridge jaw 3120 in a snap-fit connection when the staple cartridge 3110 is fully seated within the cartridge jaw 3120. In such instances, the longitudinal axis 3111 of the staple cartridge 3110 is aligned with the longitudinal axis 3121 of the cartridge jaw 3120. When the axes 3111 and 3121 are perfectly aligned, the edges of the cartridge windows 3118 and 3119 are not offset with respect to the jaw windows 3128 and 3129, respectively. To the extent that the axes 3111 and 3121 are somewhat aligned, but not perfectly aligned, the cartridge windows 3118 and 3119 may be offset with respect to the jaw windows 3128 and 3129. In either event, the at least substantially aligned windows can serve the purpose of observing the position of the sled 3116 during the firing stroke, as discussed below.

When the sled 3116 is in its proximal, unfired position, as illustrated in FIG. 27 , the sled 3116 is visible through the aligned cartridge window 3117 and jaw window 3127. In such instances, a clinician can visually observe that the staple cartridge 3110 is unspent. If the sled 3116 is not visible through the aligned cartridge window 3117 and jaw window 3127 prior to the beginning of the staple firing stroke, then the clinician can assume that the staple cartridge 3110 has been at least partially spent and that a lockout of the stapling instrument 3100, such as those described herein, for example, may be actuated if the spent staple cartridge 3110 is not replaced with an unspent staple cartridge. Moreover, if the sled 3116 is not visible through the aligned cartridge window 3117 and jaw window 3127 during the staple firing stroke, then the clinician can assume that the staple firing stroke is in progress.

When the sled 3116 has been moved half-way through the staple firing stroke, referring now to FIG. 28 , the sled 3116 is visible through the aligned cartridge window 3118 and jaw window 3128. In such instances, a clinician can visually observe that the staple cartridge 3110 has been partially spent. Although the windows 3118 and 3128 are aligned at the midpoint of the staple firing stroke, the windows 3118 and 3128 can be aligned at any suitable location. Moreover, any suitable number of window pairs 3118 and 3128 can be utilized to observe the sled 3116 during the staple firing stroke. When the sled 3116 is in its distal, fired position, as illustrated in FIG. 29 , the sled 3116 is visible through the aligned cartridge window 3119 and jaw window 3129. In such instances, a clinician can visually observe that the staple cartridge 3110 has been completely spent. Understanding whether or not a staple cartridge has been completely, or at least sufficiently, spent is important for a clinician in determining whether or not to retract the firing assembly 2550. For instance, referring to FIG. 30 , a clinician would know that the vessel V captured between the staple cartridge 3010 and the anvil jaw 2030 has been completely stapled when they can observe the sled 3116 in the distal window 3129.

Referring primarily to FIG. 26 , the sled 3116 comprises a demarcation 3115 which is observable through the aligned cartridge and jaw windows and can assist a clinician in understanding the position of the sled 3116 within the staple cartridge 3110. In at least one instance, the demarcation 3115 comprises a color which is different than the color of the cartridge jaw 3120 and/or the sled 3116, such as blue, for example. In certain instances, the demarcation can comprise a ridge, for example.

Referring primarily to FIG. 26 , the cartridge jaw 3120 further comprises a proximal datum 3123 p and a distal datum 3123 d. When the sled 3116 is in its proximal, unfired position, the demarcation 3115 is aligned with the proximal datum 3123 p. In such instances, the proximal datum 3123 p can assist a clinician in determining whether the staple cartridge 3110 is unspent. When the sled 3116 is in its distal, completely fired position, the demarcation 3115 is aligned with the distal datum 3123 d. In such instances, the proximal datum 3123 p can assist a clinician in determining whether the staple cartridge 3110 has been completely spent. The datums 3123 p and 3123 d comprise narrow linear vertical markings on the cartridge jaw 3120; however, the datums 3123 p and 3123 d can comprise any suitable configuration. In at least one instance, the datums 3123 p and 3123 d are the same color as the demarcation 3115. In other instances, the datums 3123 p and 3123 d are a different color than the demarcation 3115.

Further to the above, the intermediate cartridge window 3118 is the same size as the intermediate jaw window 3128. Similarly, the distal cartridge window 3119 is the same size as the distal jaw window 3129. That said, the proximal cartridge window 3117 is not the same size as the proximal jaw window 3127. The proximal cartridge window 3117 is narrower than the proximal jaw window 3127 as measured along the longitudinal axes 3111 and 3121. In at least one instance, the proximal cartridge window 3117 has the same width as the demarcation 3115. In such instances, a clinician can accurately assess whether or not the sled 3116 has been advanced distally even the slightest amount.

As discussed above, the cartridge jaw 3120 is configured to receive a replaceable staple cartridge therein; however, the cartridge and jaw windows disclosed herein can be used with a stapling assembly that does not comprise a replaceable staple cartridge. Moreover, the cartridge and jaw windows disclosed herein can be adapted to either side or both sides of a stapling assembly.

Referring to FIGS. 31-34 , a cartridge jaw 3220 comprises a bottom portion, or wall, 3221 and lateral side portions, or walls, 3222 extending from the bottom wall 3221. Similar to the above, the cartridge jaw 3220 is configured to receive a replaceable staple cartridge between the side walls 3222. The bottom wall 3221 comprises a longitudinal slot 3223 defined therein which is configured to receive the bottom cam of the firing assembly 2550, for example.

Referring primarily to FIGS. 33 and 34 , the longitudinal slot 3223 comprises a central portion 3224. The central portion 3224 is part of a T-shaped configuration that includes lateral portions 3225 which extend laterally from the central portion 3224. The longitudinal slot 3223 further comprises a proximal opening, or window, 3227 and a distal opening, or window, 3229 at the opposite ends of the central portion 3224. The sled of a staple cartridge is aligned with the proximal opening 3227 when the sled is in its proximal, unfired position. In such instances, a clinician can observe whether or not the staple cartridge has been spent. Similarly, the sled is aligned with the distal opening 3229 when the sled is in its distal, fully-fired position. In such instances, a clinician can observe whether or not the staple cartridge has been completely spent.

Referring again to FIGS. 31 and 32 , the longitudinal slot 3223 further comprises intermediate openings, or windows, 3228 defined in the bottom wall 3221 between the proximal opening 3227 and the distal opening 3229. Similar to the above, the progression of the sled during the staple firing stroke can be observed through the openings 3228. The openings 3228 are elongate in the longitudinal direction; however, the openings 3228 can comprise any suitable configuration. The openings 3228 are spaced periodically such that the bottom wall 3221 is sufficiently stiff between the lateral side walls 3222. Moreover, any suitable number of openings 3228 can be used, although the bottom wall 3221 will be stiffer with less openings 3228.

Referring primarily to FIG. 32 , the openings 3228 are offset with respect to the central portion 3224 of the longitudinal slot 3223. Stated another way, each opening 3228 comprises a longitudinal axis which is not collinear with a longitudinal axis of the central portion 3224. Moreover, the openings 3228 are staggered with respect the longitudinal axis of the central portion 3224 in an alternating manner. In at least one instance, a first opening 3228 is defined on one side of the longitudinal axis while a second opening 3228 is defined on the opposite side of the longitudinal axis. This pattern of the openings 3228 repeats along the length of the longitudinal slot 3223. Such an arrangement can increase the width of the walls between the openings 3228 and, as a result, increase the stiffness of the bottom wall 3221 as compared to embodiments where all of the openings 3228 are positioned along the longitudinal axis of the central portion. Other embodiments, however, are envisioned.

As discussed herein, a surgical instrument can comprise a firing assembly configured to apply a firing load, or force, to a sled of a staple cartridge during a firing stroke. The firing load is sufficient to push the staples out of the staple cartridge and into the tissue of a patient, deform the staples against an anvil, and incise the tissue. In certain instances, the firing load can increase significantly beyond a threshold which is deemed safe and/or suitable for the operation of the surgical instrument. In at least one such instance, the firing load can increase significantly when the firing assembly abuts a missing cartridge lockout and/or a spent cartridge lockout, for example.

Referring now to FIGS. 35-38 , a surgical instrument 3500 comprises a shaft 3540 and a firing assembly 3550. The firing assembly 3550 comprises a first firing rod 3551, a second firing rod 3552, and a firing bar 3554. The firing assembly 3550 further comprises a biasing member, or spring, 3556 positioned intermediate the first firing rod 3551 and the second firing rod 3552. When the first firing rod 3551 is advanced distally, the first firing rod 3551 pushes the second firing rod 3552 distally via the spring 3556. The distal end of the second firing rod 3552 is connected to the firing bar 3554 at an interconnection 3553 and, when the second firing rod 3552 is advanced distally, the second firing rod 3552 pushes the firing bar 3554 distally. Stated another way, a firing load can be transmitted from the first firing rod 3551 to the second firing rod 3552 through the spring 3556 and ultimately to the firing bar 3554.

Further to the above, the spring 3556 is compressed between the first firing rod 3551 and the second firing rod 3552 in response to the firing load, or force, transmitted through the firing assembly 3550. When the firing load transmitted through the firing assembly 3550 is below a predetermined force threshold, the spring 3556 transmits the firing load to the second firing rod 3552 to perform the firing stroke, as illustrated in FIG. 35 . When the firing load exceeds the threshold, the spring 3556 is compressed to a point in which a proximal end 3555 of the second firing rod 3552 actuates a lockout system which prevents the firing assembly 3550 from being advanced through its staple firing stroke, as illustrated in FIG. 36 . At such point, the clinician can evaluate the surgical instrument 3500 as to why the firing force threshold of the surgical instrument 3500 was exceeded.

Further to the above, the spring 3556, when compressed, applies a biasing force to the second firing rod 3552 which opposes the proximal movement of the second firing rod 3552 relative to the first firing rod 3551. The threshold force of the firing assembly 3550 accounts for the firing force needed to staple and cut the tissue and, in addition, the biasing force created by the spring 3556. In various instances, the biasing force of the spring 3556 opposes the firing force transmitted through the second firing rod 3552. Moreover, the biasing force of the spring 3556 increases linearly, and proportionately, in response to the relative movement between the second firing rod 3552 and the first firing rod 3551. That said, once the force transmitted through the firing assembly 3550 exceeds the threshold force, the lockout system switches between an unlocked configuration and a locked configuration, as discussed in greater detail below.

Further to the above, and as also described in greater detail below, the lockout system of the firing assembly 3550 can be tripped, or actuated, into a locked stated when the compression of the spring 3556 has exceeded a threshold compression, or deflection. Stated another way, the lockout system does not actuate into a locked state while the compression of the spring 3556 is below the threshold compression of the spring 3556.

The lockout system comprises, further to the above, a lock 3570 rotatably mounted to a frame 3542 of the shaft 3540 about a pivot 3571 and, in addition, a lock actuator 3577 mounted to the first firing rod 3551. The lock 3570 is held in an unlocked position, or configuration, by the lock actuator 3577 when the lock actuator 3577 has not been actuated. The lock actuator 3577 is rotatably mounted to the first firing rod 3551 and is rotatable between an unactuated position (FIG. 35 ) and an actuated position (FIG. 36 ). When the spring 3556 of the firing assembly 3550 is not compressed more than its threshold compression, or above its force threshold, as illustrated in FIG. 35 , the lock actuator 3577 is biased into its unactuated position by a torsion spring 3576 and the lock 3570 is held out of engagement with the firing assembly 3550.

When the spring 3556 is compressed more than its threshold compression, or above its force threshold, the proximal end 3555 of the second firing rod 3552 engages the lock actuator 3577 and rotates the lock actuator 3577 into its actuated position, as illustrated in FIG. 36 . In such instances, the lock 3570 is released by the lock actuator 3577 and engages the second firing rod 3552. More specifically, the lockout system further comprises a biasing member, or spring, 3572 configured to push the lock 3570 into engagement with the second firing rod 3552 once the lock 3570 is released. The lock 3570 comprises a lock shoulder 3578 which is configured to be received within a lock recess, or notch, 3558 defined in the second firing rod 3552 which prevents the firing assembly 3550 from being advanced distally.

The reader should appreciate that the lock 3570 of the lockout system can only stop the advancement of the firing assembly 3550 when the lock notch 3558 defined in the second firing rod 3552 is aligned with the lock 3570. Once the firing assembly 3550 is advanced distally during the staple firing stroke and the lock notch 3558 is moved out of alignment with the lock shoulder 3578, as illustrated in FIG. 37 , the lock 3570 is constrained in its unlocked position, or configuration, by the first firing rod 3551 throughout the firing stroke of the firing assembly 3550. As such, the lockout system of the firing assembly 3550 comprises a beginning-of-stroke lockout that stops the firing assembly 3550 from performing a staple firing stroke.

Further to the above, a missing cartridge lockout and/or a spent cartridge lockout in the end effector of the surgical instrument 3500, for example, can block the distal advancement of the firing assembly 3550 when a spent staple cartridge is seated in the end effector of the surgical instrument 3500 and/or an unspent staple cartridge is missing from the end effector altogether. In such instances, the force transmitted through the firing assembly 3550 will increase above the threshold force and the lockout system of the firing assembly 3550 can respond by also blocking the distal advancement of the firing assembly 3550. In various instances, the firing assembly lockout can bolster the missing cartridge and/or spent cartridge lockout. In such instances, as a result, the firing assembly 3550 cannot be used to cut tissue without an unspent staple cartridge properly seated in the end effector of the surgical instrument 3500.

In order to reset the firing assembly 3550, further to the above, the clinician can operate the surgical instrument 3500 to retract the firing assembly 3550 proximally. In at least one instance, the surgical instrument 3500 comprises an electric motor configured to drive the firing assembly 3550 through its staple firing stroke which can be operated in reverse to retract the firing assembly 3550. When the firing assembly 3550 is at least partially retracted, the spring 3556 can re-expand and push the second firing rod 3552 away from the first firing rod 3551 to disengage the second firing rod 3552 from the lock actuator 3577 of the lockout system. At such point, the firing assembly 3550 can be advanced distally to complete its staple firing stroke, as illustrated in FIG. 37 .

A staple cartridge 3610 comprising a spent cartridge lockout is illustrated in FIGS. 39-42 . The staple cartridge 3610 comprises a cartridge body 3612 including staple cavities and a longitudinal slot 3614 defined therein. Referring primarily to FIG. 41 , the staple cartridge 3610 further comprises a sled 3616 which is movable between a proximal, unfired position (FIG. 39 ) and a distal, fired position by a firing assembly, such as firing assembly 2550, for example, to eject staples removably stored in the staple cavities during a staple firing stroke. Referring now to FIG. 39 , a portion of the sled 3616 travels within the longitudinal slot 3614 during the staple firing stroke. Moreover, referring to FIG. 40 , a portion of the firing assembly 2550 also travels within the longitudinal slot 3614 during the staple firing stroke. More specifically, the firing assembly 2550 comprises a coupling member 2551 that travels within the slot 3614.

The staple cartridge 3610 further comprises a lock 3670. The lock 3670 comprises a first end mounted to the cartridge body 3612 and a second end 3672 that extends into the longitudinal slot 3614. When the staple cartridge 3610 is in an unfired condition and the sled 3616 is in its proximal, unfired position, referring again to FIG. 40 , the second end 3672 of the lock 3670 is flexed into and held in an unlocked state by the sled 3616. In such instances, the lock 3670 cannot prevent the staple firing stroke from being initiated by the firing assembly 2550. As the sled 3616 is advanced distally by the firing assembly 2550, the sled 3616 is moved out of contact with the lock 3670. In such instances, the firing assembly 2550 continues to hold the lock 3670 in its unlocked configuration throughout the staple firing stroke.

After the staple firing stroke has been at least partially completed, the firing assembly 2550 can be retracted. In such instances, the sled 3616 is not retracted with the firing assembly 2550. Instead, the sled 3616 is left behind in a distal position within the cartridge body 3616. Thus, after the firing assembly 2550 has been completely retracted, referring to FIG. 42 , the lock 3670 can unflex into a locked configuration such that the second end 3672 blocks the longitudinal slot 3614. Stated another way, the second end 3672 of the lock 3670 can block the firing assembly 2550 from being advanced through another staple firing stroke.

Further to the above, the lock 3670 comprises a spent cartridge lockout. After the sled 3616 has been advanced distally out of alignment with the lock 3670, the staple cartridge 3610 has become a spent staple cartridge whether or not all of, or any of, the staples have been ejected from the staple cartridge 3610. Retraction of the firing assembly 2550 into its unfired position, at such point, would cause the staple cartridge 3610 to lock itself out. Accordingly, the staple cartridge 3610 would have to be removed from the surgical instrument and replaced with an unspent staple cartridge before the surgical instrument could be used once again.

Further to the above, the cartridge body 3610 can include a notch 3615 configured to receive a portion of the lock 3670 when the lock 3670 moves into its locked configuration, as illustrated in FIG. 42 . The notch 3615 is defined in a sidewall of the longitudinal slot 3614 and positioned opposite the first portion of the lock 3670 which is mounted to the cartridge body 3612. Interaction between the second end 3672 of the lock 3670 and the sidewalls of the notch 3615 can strengthen the lockout and reduce the possibility of the firing assembly 2550 being pushed by the lock 3670. In addition to or in lieu of the above, the firing assembly 2550 can comprise a lockout which is triggered, or actuated, when the firing assembly 2550 abuts the lock 3670.

Turning now to FIGS. 43-47 , a firing assembly 3750 of a surgical instrument 3700 comprises a firing rod 3752 and a firing bar 3754. The firing rod 3752 comprises an aperture 3755 defined in the distal end thereof. The aperture 3755 comprises a proximal endwall 3756 and a distal endwall 3757. The firing bar 3754 comprises a lockout 3770 positioned in the aperture 3755 at an interface 3753. When the firing rod 3752 is advanced distally during a staple firing stroke, the proximal endwall 3756 of the aperture 3755 contacts the lockout 3770 and pushes the firing bar 3754 distally. In the event that the force transmitted between the firing rod 3752 and the firing bar 3754 exceeds a predetermined force threshold, the lockout 3770 moves from an unlocked state (FIG. 45 ) into a locked state (FIG. 46 ). Similar to the above, the force threshold can be exceeded when the firing assembly 3750 abuts a spent cartridge lockout and/or a missing cartridge lockout, for example.

The lockout 3770 is rotatably and slidably mounted to the firing bar 3754. The firing bar 3754 comprises a longitudinal slot 3775 defined therein and the lockout 3770 comprises a pin 3771 slidably positioned within the slot 3775. The firing bar 3754 further comprises a spring 3776 positioned intermediate the pin 3771 and a distal end of the slot 3775. As a result, a firing force transmitted from the firing rod 3752 can flow through the lockout 3770 and the lockout pin 3771, through the spring 3776, and into the firing bar 3754—so long as the firing force is below the force threshold. In the event that the firing force exceeds the force threshold, the firing rod 3752 can push the lockout 3770 distally within the longitudinal slot 3775, as illustrated in FIG. 46 . In such instances, the lockout 3770 can also rotate upwardly into engagement with a shaft 3740 of the surgical instrument 3700. More specifically, referring primarily to FIG. 44 , the firing bar 3754 comprises ledges 3772 extending laterally therefrom which prevent the lockout 3770 from rotating upwardly when the firing force is below the threshold and the lockout 3770 is positioned in the proximal end of the longitudinal slot 3775; however, once the lockout 3770 is pushed distally away from the ledges 3772, the firing force acts to rotate the lockout 3770 upwardly as illustrated in FIG. 46 .

Further to the above, the shaft 3740 comprises a frame 3742 including a lock aperture 3748 defined therein which is configured to receive a portion of the lockout 3770 when the lockout 3770 is rotated upwardly. The interaction between the lockout 3770 and the sidewalls of the lock aperture 3748 prevent the firing assembly 3750 from being advanced distally through its staple firing stroke. Similar to the above, the lock aperture 3748 is defined in the shaft 3740 at a location which corresponds to the initiation of the staple firing stroke. As a result, the lockout 3770 is configured and arranged to assist in locking out the surgical instrument 3700 in the event that a staple cartridge is missing from, or a spent staple cartridge is positioned within, the surgical instrument 3700. That said, the lock aperture 3748 can be positioned in any suitable location. Moreover, more than one lock aperture 3748 can be utilized to provide more than one location in which the firing assembly 3750 can be locked out.

The lockout 3770 can be reset after it has been moved into its locked configuration (FIG. 46 ). Turning now to FIG. 47 , the firing rod 3752 can be moved proximally until the distal endwall 3757 of the aperture 3755 contacts the lockout 3770 and, at such point, the endwall 3757 can rotate the lockout 3770 downwardly and positively return the lockout 3770 to its unlocked configuration as the firing rod 3752 continues to move proximally. Moreover, the firing rod 3752 can pull the lockout 3770 back under the ledges 3772 (FIG. 44 ) as the firing rod 3752 is being retracted. At such point, the firing assembly 3750 is reset and can be re-advanced distally—assuming that the impediment which blocked the firing assembly 3750 has been addressed.

Turning now to FIGS. 48-51 , a surgical instrument 3800 comprises a shaft 3840 and a firing assembly 3850. The shaft 3840 comprises a frame 3842 and a longitudinal passage configured to slidably receive the firing assembly 3850. The firing assembly 3850 comprises a first firing rod 3851, a second firing rod 3852, and a firing bar 3854. The first firing rod 3851 is coupled to the second firing rod 3852 at an interconnection 3853. In use, referring to FIG. 49 , the interconnection 3853 is configured to transmit a force, or firing load, between the first firing rod 3851 and the second firing rod 3852. However, as discussed in greater detail below, the interconnection 3853 is configured to slip when the firing load transmitted through the firing assembly 3850 exceeds a predetermined force threshold.

Further to the above, the second firing rod 3852 comprises a proximal end 3855 positioned in a cavity defined in the distal end of the first firing rod 3851. The first firing rod 3851 further comprises lock arms 3857 engaged with the proximal end 3855 of the second firing rod 3852 which are configured to transmit the firing load from the first firing rod 3851 to the second firing rod 3852 when the firing load is below the force threshold. More specifically, the lock arms 3857 push on inclined surfaces 3859 defined on the proximal end 3855 of the second firing rod 3852. When the firing load exceeds the force threshold, the lock arms 3857 slide along the inclined surfaces 3859 causing the interconnection 3853 to slip, splay, and elastically flare outwardly to disrupt the firing stroke of the firing assembly 3850.

Further to the above, referring to FIG. 50 , the lock arms 3857 are configured to engage lock shoulders 3847 defined on the shaft frame 3842 when the lock arms 3857 slide relative to the inclined surfaces 3859 and flare outwardly. The interaction between the lock arms 3857 and the lock shoulders 3847 prevents the firing assembly 3850 from being advanced through its staple firing stroke. Similar to the above, the lock shoulders 3847 are positioned at the beginning of the staple firing stroke of the firing assembly 3850 such that the lockout feature of the firing assembly 3850 is responsive to a beginning-of-stroke lockout; however, the lock shoulders 3847 can be placed at any suitable location, or locations.

Further to the above, the firing assembly 3850 can be reset after it has been locked out. The first firing rod 3851 can be retracted proximally to operably re-engage the lock arms 3857 with the proximal end 3855 of the second firing rod 3852. In such instances, the lock arms 3857 can resiliently move inwardly to grasp the proximal end 3855. The firing assembly 3850 further comprises a biasing member, or spring, 3856 configured to bias a head of the proximal end 3855 against the lock arms 3857. Once the interconnection 3853 has been reset, referring to FIG. 51 , the firing assembly 3850 can be advanced through its staple firing stroke—assuming that the force threshold is not exceeded once again. Notably, the shaft frame 3842 prevents the lock arms 3857 from disengaging from the second firing rod 3852 during the staple firing stroke.

Turning now to FIGS. 52-56 , a surgical instrument 3900 comprises a shaft 3940, an end effector positioned at a distal end of the shaft 3940, an articulation actuator 3980 configured to articulate the end effector relative to the shaft 3940, and a firing assembly 3950. The shaft 3940 comprises a shaft frame 3942 which has a longitudinal cavity 3949 defined therein. The firing assembly 3950 comprises a first firing rod 3951, a second firing rod 3952, and a firing bar 3954. The first firing rod 3951 comprises a distal end 3957 operably engaged with a proximal end 3955 of the second firing rod 3952 at an interface 3953. When the firing load transmitted through the firing assembly 3950 is below a predetermined force threshold, referring to FIGS. 52-55 , the firing assembly 3950 can be pushed through a staple firing stroke. When the firing load exceeds the predetermined threshold within, and only within, a lockout zone that is prior to or at the beginning of the staple firing stroke, referring to FIG. 56 , the distal end 3957 of the first firing rod 3951 can slip relative to the proximal end 3955 of the second firing rod 3952 and stop the distal advancement of the second firing rod 3952.

Further to the above, in at least one embodiment, the distal end 3957 of the first firing rod 3951 comprises a barb and the proximal end 3955 of the second firing rod 3952 comprises a barb catch configured to be coupled with the barb of the distal end 3957. When the distal end 3957 decouples from the proximal end 3955, the barb of the distal end 3957 can engage a wall 3948 in the shaft 3940 and stop the distal advancement of the first firing rod 3951, and the firing assembly 3950, when the first firing rod 3951 slips relative to the second firing rod 3952.

Referring again to FIGS. 52 and 53 , the firing assembly 3950 further comprises a firing collar 3959 slidably positioned in the longitudinal cavity 3949 of the shaft 3940. The firing collar 3959 is comprises of a resilient material which is frictionally-engaged with the sidewalls of the longitudinal cavity 3949, for example. Upon comparing FIGS. 52 and 53 , it can be seen that the second firing rod 3952 slides within the firing collar 3959 while the firing collar 3959 remains stationary during the initial distal movement of the firing assembly 3950. This initial distal movement of the firing assembly 3950 is not part of the staple firing stroke. Such initial distal movement of the firing assembly 3950, however, can be used to perform a different function within the end effector, such as closing the end effector, for example.

Further to the above, the first firing rod 3951 comprises a projection 3960 defined thereon configured to engage the firing collar 3959 to initiate the staple firing stroke. At such point, the interface 3953 is positioned within the firing collar 3959 which prevents the distal end 3957 of the first firing rod 3951 from slipping relative to the proximal end 3955 of the second firing rod 3952 during the staple firing stroke. As a result of the above, the interface 3953 can decouple prior to or at the beginning of the staple firing stroke but, on the other hand, remain intact throughout the staple firing stroke. The firing collar 3959 comprises a rigid proximal end 3958 that is engaged by the projection 3960 and is pushed distally by the projection 3960 during the staple firing stroke, as illustrated in FIG. 56 . The firing assembly 3950 further comprises a spring 3956 positioned intermediate and compressed between the firing bar 3954 and the firing collar 3959 which can assist in controlling the relative position between the firing bar 3954 and the firing collar 3959.

Turning now to FIGS. 57-59 , a surgical instrument 4000 comprises a shaft 4040 and a firing assembly 4050. The shaft 4040 comprises a frame 4042 including a longitudinal aperture 4048 defined therein. The firing assembly 4050 comprises a firing rod 4052 and a plurality of flexible firing bars, or layers, 4054 that are operably coupled to a distal end 4057 of the firing rod 4052 at an interface 4053. The layers 4054 are configured to transmit a firing force from the firing rod 4052 to a coupling member 4051 of the firing assembly 4050 when the firing force is below a predetermined force threshold, as illustrated in FIG. 57 . In the event that the firing force exceeds the force threshold, the layers 4054 can flex outwardly, as illustrated in FIG. 58 , which can prevent the firing assembly 4050 from performing the staple firing stroke. In order to reset the firing assembly 4050, the firing rod 4052 can be retracted proximally to permit the layers 4054 to resiliently flex inwardly to their unflexed state. As illustrated in FIG. 59 , the firing assembly 4050 further comprises a firing collar 4059 configured to bolster the layers 4054 and prevent the layers 4054 from flexing outwardly during the staple firing stroke. Similar to the above, the firing collar 4059 is comprised of a flexible material that is frictionally-engaged with the sidewalls of the longitudinal shaft aperture 4048 and does not initially move with the layers 4054. Stated another way, the firing collar 4059 does not travel with the layers 4054 until the distal end 4057 of the firing rod 4052 contacts the firing collar 4059.

Turning now to FIGS. 60-64 , a surgical instrument 4100 comprises a shaft 4040 and a firing assembly 4150. The firing assembly 4150 comprises a first firing rod 4151, a second firing rod 4152, and a firing bar 4154. The first firing rod 4151 comprises a distal end positioned within an aperture 4153 defined in a proximal end of the second firing rod 4152. The second firing rod 4152 comprises a distal end comprising a longitudinal slot 4155 defined therein configured to receive a proximal end of the firing bar 4154. Referring primarily to FIGS. 60 and 61 , the second firing rod 4152 comprises a wall 4157 configured to transmit a firing force from the second firing rod 4152 to the firing bar 4154. The wall 4157 comprises a fuse. When the firing force is below a predetermined force threshold, the wall 4157 is configured to remain intact, as illustrated in FIG. 62 . In at least one instance, the force threshold is 80 lbf, for example. The wall 4157, however, is configured to fail when the firing force exceeds the force threshold, as illustrated in FIG. 63 . At such point, the firing bar 4154 slidable within a longitudinal slot 4158 defined in the second firing rod 4152 and the distal movement of the second firing rod 4152 is not transmitted to the firing bar 4154. The fuse, or wall, 4157 is not resettable.

The firing assembly 4150 can comprise other fuses in addition to or in lieu of the above. For instance, the second firing rod 4152 further comprises fuses 4156 positioned proximally with respect to the wall 4157. Fuses 4156 comprise displaceable elements positioned within and frictionally-engaged with the sidewalls of the longitudinal slot 4158. In certain embodiments, the fuses 4156 comprise walls integrally formed with the sidewalls of the slot 4158. In at least one instance, the fuses 4156 are each configured to fail at the same force threshold as the wall 4157, such as 80 lbf, for example. In such instances, a fuse 4156 can push the firing bar 4154 distally and the staple firing stroke can be completed in the event that the firing force exceeded the force threshold for only a moment. In the event that the firing force exceeds the force threshold for more than a moment, the fuses 4156 can fail sequentially, as illustrated in FIG. 64 . Alternatively, the fuses 4156 can be configured to fail at a threshold, or thresholds, that are larger than the force threshold of the wall 4157. For instance, the wall 4157 can have a force threshold of 60 lbf while the fuses can have a force threshold of 80 lbf. In at least one embodiment, the fuses 4156 can be configured to fail at increasingly higher force thresholds. For instance, the distal-most fuse 4156 can comprise the weakest fuse 4156, the fuse 4156 adjacent to the distal-most fuse 4156 can be stronger than the distal-most fuse 4156, and so forth. In other embodiments, the fuses 4156 fail at a lower force threshold than the wall 4157. In at least one such instance, the wall 4157 has a force threshold of 80 lbf and the fuses 4156 each have a force threshold of 60 lbf, for example.

Further to the above, the longitudinal slot 4158 has a length which is equal to or greater than the firing stroke of the firing assembly 4150. As a result, the second firing rod 4152 can be moved through its entire firing stroke after the wall 4157 and fuses 4156 fail without the firing bar 4154 abutting the proximal end of the longitudinal slot 4158. In order to retract the firing bar 4154 after the wall 4157 and/or the fuses 4156 have failed, the second firing rod 4152 can be retracted until the distal end of the longitudinal slot 4158 engages the firing bar 4154 and pulls the firing bar 4154 proximally. In certain instances, the firing bar 4154 is frictionally-engaged with the sidewalls of the longitudinal slot 4158 such that the firing bar 4154 can be retracted by the second firing rod 4152 if the wall 4157 and/or the fuses 4156 have failed.

Turning now to FIGS. 65-70 , a surgical instrument 4200 comprises a shaft 4040 and a firing assembly 4250. The firing assembly 4250 comprises a first firing rod 4251, a second firing rod 4252 mounted to the first firing rod 4251, and a firing bar 4254. The second firing rod 4252 comprises a distal end shoulder 4257 operably engaged with a proximal end shoulder 4255 of the firing bar 4254 at an interface 4253 to transmit a firing load through the firing assembly 4250 during a staple firing stroke when the firing load is below a predetermined force threshold, as illustrated in FIGS. 65 and 66 . The second firing rod 4252 further comprises one or more biasing members 4256 extending laterally therefrom. The biasing members 4256 are slidably engaged with the sidewalls of the longitudinal aperture 4048 in the shaft frame 4042. The biasing members 4256 are configured to bias the second firing rod 4252 into engagement with the firing bar 4254. When the firing load exceeds the force threshold, as illustrated in FIG. 67 , the biasing members 4256 can compress or deflect and permit the second firing rod 4252 to deflect laterally and operably disengage from the firing bar 4254. At such point, the second firing rod 4252 can slide relative to the firing bar 4254 without transmitting the firing force to the second firing rod 4252.

Further to the above, the firing assembly 4250 is resettable. Referring now to FIG. 68 , the first firing rod 4251 can be retracted proximally to retract the second firing rod 4252 such that, referring to FIG. 69 , the distal end shoulder 4257 of the second firing rod 4252 is realigned and operably re-coupled with the proximal end shoulder 4255 of the firing bar 4254. In such instances, the biasing members 4256 can unflex and re-expand to re-align the second firing rod 4252 with the firing bar 4254. At such point, referring now to FIG. 70 , the firing assembly 4250 can be advanced distally once again to complete the staple firing stroke. The reader should note that the interface 4253 of the firing assembly 4250 can decouple, and be recoupled, at any point before and/or during the staple firing stroke. Thus, the interface 4253 can decouple when the firing assembly 4250 engages a missing cartridge lockout, a spent cartridge lockout, and/or at any other moment in which the firing force becomes excessive.

Turning now to FIGS. 71-77 , a surgical instrument 4300 comprises a shaft 4340 and a firing assembly 4350. The shaft 4340 comprises a frame 4342. The frame 4342 comprises a proximal longitudinal aperture 4346 and a distal longitudinal aperture 4349 configured to receive the firing assembly 4350. The firing assembly 4350 comprises a first firing rod 4351, a second firing rod 4352 operably coupled to the first firing rod 4351, and a firing bar 4354 operably coupled to the second firing rod 4352 at an interface 4353. The interface 4353 comprises a multi-stage fuse, as described in greater detail below.

Further to the above, the firing bar 4354 comprises a proximal connector 4355 including drive recesses 4359 defined on opposite sides thereof. The proximal connector 4355 is positioned in a longitudinal slot 4358 defined in the second firing rod 4352 and is operably, and releasably, coupled to the second firing rod 4352 via projections 4356 which extend inwardly from the sidewalls of the second firing rod 4352 to engage the drive recesses 4359. In use, a firing load is transmitted from the first firing rod 4351, through the second firing rod 4352, and into the firing bar 4354 to perform a staple firing stroke when the firing load is below a predetermined force threshold, as illustrated in FIGS. 71 and 72 .

When the firing load transmitted through the firing assembly 4350 exceeds the force threshold, referring now to FIG. 73 , the sidewalls of the second firing rod 4352 can flex outwardly such that the projections 4356 can disengage from the drive recesses 4359 defined in the connector 4355. At such point, the firing bar 4354 is operably disengaged from the second firing rod 4352 and the staple firing stroke has been interrupted. When the interface 4353 decouples at the initiation of the staple firing stroke, referring again to FIG. 73 , the deflected sidewalls of the second firing rod 4352 can flex outwardly into the longitudinal aperture 4346 and engage the shaft frame 4342 to prevent the staple firing stroke of the firing assembly 4350. Stated another way, the deflected sidewalls of the second firing rod 4352 cannot enter the longitudinal aperture 4349 when the firing load exceeds the force threshold which prevents the second firing rod 4352 from being advanced distally.

When the firing load exceeds the force threshold during the staple firing stroke, however, the sidewalls of the second firing rod 4352 cannot deflect outwardly, or substantially outwardly, owing to their close proximity to the sidewalls of the longitudinal aperture 4349. As a result, a complete decoupling of the interface 4353 does not immediately occur if the force threshold is exceeded. Instead, referring to FIG. 74 , the firing assembly 4350 can enter into a first failed state. In the first failed state of the firing assembly 4350, the projections 4356 of the second firing rod 4352 have decoupled from the drive recesses 4359 defined in the proximal connector 4355 of the firing bar 4354, however, the projections 4356 are still engaged with the proximal connector 4355. More specifically, the projections 4356 are compressed against the lateral sides of the proximal connector 4355 by the sidewalls of the longitudinal aperture 4349 such that a firing force, and/or a retraction force, can still be transmitted from the second firing rod 4352 to the firing bar 4354. In such instances, the staple firing stroke can be completed and/or the clinician can decide to retract the firing assembly 4350.

Further to the above, referring now to FIG. 75 , the interface 4353 between the second firing rod 4352 and the firing bar 4354 can completely decouple and enter into a second failed state. In the second failed state, the projections 4356 are no longer engaged with the proximal connector 4355 of the firing bar 4354 and, as a result, the second firing rod 4352 can no longer deliver a firing motion and/or firing force to the firing bar 4354. Instead, the second firing rod 4352 will move relative to the firing bar 4354 as the second firing rod 4352 is moved distally. As illustrated in FIG. 71 , the second firing rod 4352 comprises a longitudinal slot 4358 configured to accommodate relative movement between the second firing rod 4352 and the firing bar 4354. The longitudinal slot 4358 is long enough such that the firing bar 4354 does not contact the proximal end 4357 of the slot 4358.

In various instances, further to the above, the force threshold for the firing assembly 4350 to enter into its first failed state and the force threshold for the firing assembly 4350 to enter into is second failed state are the same. In such instances, the firing assembly 4350 can switch into its first failed state if a momentary pulse, or increase, in the firing force occurs and, yet, still operate in the first failed state. If, however, the increase in the firing force is not momentary, the firing assembly 4350 can then quickly enter into its second failed state. In at least one instance, the first and second force thresholds are 80 lbf, for example. In other instances, the force threshold for the firing assembly 4350 to enter into its first failed state and the force threshold for the firing assembly 4350 to enter into is second failed state are different. For instance, the first force threshold is 60 lbf and the second force threshold is 80 lbf, for example. Alternatively, the first force threshold is 80 lbf and the second force threshold is 60 lbf, for example. In either event, the firing assembly 4350 may be able to push through high firing force conditions and still be functional.

In either event, referring now to FIGS. 71 and 72 , the firing assembly 4350 can be reset by retracting the second firing rod 4352. In at least one instance, the firing assembly 4350 can be reset into its first failed state and then re-operated. In other instances, the second firing rod 4352 is retracted until the projections 4356 resiliently re-engage the drive recesses 4359 defined in the proximal connector 4355 of the firing bar 4354 to completely reset the interface 4353 of the firing assembly 4350 before the firing assembly 4350 is re-operated. In either event, the retraction force applied to the second firing rod 4352 can be less than first force threshold and/or the second force threshold, for example.

A staple cartridge 4400 is illustrated in FIGS. 77A and 77B. The staple cartridge 4400 is similar to the staple cartridges disclosed herein in many respects—most of which are not discussed herein for the sake of brevity. Moreover, the staple cartridge 4400 is usable with any of the surgical instruments disclosed herein. The staple cartridge 4400 comprises a cartridge body 4410 and a sled movable through the cartridge body 4410 by a firing member during a firing stroke. The cartridge body 4410 comprises a longitudinal slot 4415 defined therein which is configured to receive the firing member. The cartridge body 4410 further comprises longitudinal rows of staple cavities 4420 and longitudinal rows of staple cavities 4430. More specifically, the cartridge body 4410 comprises two inner rows of staple cavities 4420 positioned on each side of the longitudinal slot 4415 and an outer row of staple cavities 4430 positioned on each side of the rows of staple cavities 4420. That said, the staple cartridge 4400 can comprise any suitable number and arrangement of staple cavities 4420 and 4430. The longitudinal rows of staple cavities 4420 and 4430 are parallel, or at least substantially parallel, to one another; however, other embodiments are envisioned in which the longitudinal rows of staple cavities 4420 and 4430 are not parallel to one another.

The staple cartridge 4400 further comprises staples 4440 removably stored in the staple cavities 4420 and staples 4450 stored in the staple cavities 4430. The staples 4440 comprise stamped staples which have been stamped from one or more sheets of material. The staples 4450 comprise wire staples which have been bent into a substantially V-shaped configuration, for example. The V-shaped configuration is an unformed, or unfired, configuration. That said, the staples 4450 can have any suitable unfired configuration. In any event, the staple cartridge 4400 further comprises staple drivers 4480 configured to eject the staples 4450 from the staple cavities 4430. During the firing stroke, the sled is configured to engage the staple drivers 4480 and push the staples 4450 upwardly out of the staple cavities 4430. Concurrently, the sled directly engages the staples 4440 to eject the staples 4440 from the staple cavities 4420. Referring to FIG. 77B, the staples 4440 and 4450 contact an anvil 4490, or any other suitable anvil, positioned opposite the staple cartridge 4400 as the staples 4440 and 4450 are being ejected from the staple cartridge 4400. The anvil 4490 comprises forming pockets 4470 defined therein which are aligned with the legs of the staples 4440 and 4450 and are configured to deform the staples 4440 and 4450 during the firing stroke. In alternative embodiments, an anvil can comprise a first type of forming pocket aligned with each staple 4440 and a second, or different, type of forming pocket aligned with each staple 4450.

Further to the above, the anvil 4490 is configured to deform the staples 4440 to a first formed height and the staples 4450 to a second, or different, formed height. In at least one such instance, the first formed height of the staples 4440 is taller than the second formed height of the staples 4450. In alternative embodiments, the anvil 4490 is configured to deform the staples 4440 and the staples 4450 to the same formed height. In any event, the anvil 4490 further comprises a longitudinal slot 4495 defined therein which is configured to receive the firing member during the firing stroke. The longitudinal anvil slot 4495 is aligned, or centered, with the longitudinal cartridge slot 4415 along a longitudinal axis 4405.

A staple cartridge 4500 is illustrated in FIGS. 77C and 77D. The staple cartridge 4500 is similar to the staple cartridges disclosed herein in many respects—most of which are not discussed herein for the sake of brevity. Moreover, the staple cartridge 4500 is usable with any of the surgical instruments disclosed herein. The staple cartridge 4500 comprises a cartridge body 4510 and a sled movable through the cartridge body 4510 by a firing member during a firing stroke. The cartridge body 4510 comprises a longitudinal slot 4415 defined therein which is configured to receive the firing member. The cartridge body 4510 further comprises longitudinal rows of staple cavities 4520′ and longitudinal rows of staple cavities 4520″. More specifically, the cartridge body 4510 comprises an inner row of staple cavities 4520′ positioned on each side of the longitudinal slot 4415 and two outer rows of staple cavities 4520″ positioned on each side of the rows of staple cavities 4520′. That said, the staple cartridge 4500 can comprise any suitable number and arrangement of staple cavities 4520′ and 4520″. The longitudinal rows of staple cavities 4520′ and 4520″ are parallel, or at least substantially parallel, to one another; however, other embodiments are envisioned in which the longitudinal rows of staple cavities 4520′ and 4520′ are not parallel to one another.

The staple cartridge 4500 further comprises staples 4540′ removably stored in the staple cavities 4520′ and staples 4540″ stored in the staple cavities 4520″. The staples 4540′ comprise stamped staples which have been stamped from one or more sheets of material. The staples 4540″ also comprise stamped staples which have been stamped from one or more sheets of material. As illustrated in FIG. 77E, the staples 4540″ are larger than the staples 4540′. More specifically, the staples 4540″ are taller than the staples 4540′. In addition, the staples 4540″ are wider than the staples 4540′. During the firing stroke, the sled directly engages the staples 4540′ and 4540″ to eject the staples 4540′ from the staple cavities 4520′ and the staples 4540″ from the staple cavities 4520″. Referring to FIG. 77D, the staples 4540′ and 4540″ contact an anvil 4590, or any other suitable anvil, positioned opposite the staple cartridge 4500 as the staples 4540′ and 4540″ are being ejected from the staple cartridge 4500. The anvil 4590 comprises forming pockets 4570′ defined therein which are aligned with the legs of the staples 4540′ and, in addition, forming pockets 4570″ defined therein which are aligned with the legs of the staples 4540″. The forming pockets 4570′ and 4570″ are configured to deform the staples 4540′ and 4540″, respectively, during the firing stroke.

Referring to FIGS. 77E and 77F, the anvil 4590 is configured to deform the staples 4540′ to a first formed height and the staples 4540″ to a second, or different, formed height. In at least one instance, the second formed height of the staples 4540″ is taller than the first formed height of the staples 4540′. In use, the innermost row of staples 4540′ in the staple cartridge 4500 are configured to apply a sufficiently-hemostatic seal in the incised tissue T, referring to FIG. 72F, and the outer row of larger staples 4540″ are configured to provide a certain amount of flexibility in the staple line. In alternative embodiments, the staples 4540′ and 4540″ are deformed to the same formed height. In any event, the anvil 4590 further comprises a longitudinal slot 4595 defined therein which is configured to receive the firing member during the firing stroke. The longitudinal anvil slot 4595 is aligned, or centered, with the longitudinal cartridge slot 4415 along a longitudinal axis 4505.

FIG. 78 illustrates an exemplary surgical instrument 100 comprising a handle 110 and an interchangeable shaft assembly 200 operably coupled thereto. The handle 110 comprises a housing 140 that is configured to be grasped, manipulated, and/or actuated by a clinician. The shaft assembly 200 comprises a shaft 210 and an end effector 300. The shaft 210 comprises a shaft frame (not shown in FIG. 78 ), and a hollow outer sleeve or closure tube 250 through which the shaft frame extends. The shaft assembly 200 further includes a nozzle assembly 290 configured to interface with the outer sleeve 250 and enable the clinician to selectively rotate the shaft 210 about a longitudinal axis. The shaft assembly 200 also includes a latch 230 which is a part of a lock system that releasably locks the shaft assembly 200 to the handle 110. In various circumstances, the latch 230 can close an electrical circuit in the handle 110, for example, when the latch 230 is engaged with the handle 110. The entire disclosure of U.S. patent application Ser. No. 13/803,086, entitled ARTICULATABLE SURGICAL INSTRUMENT COMPRISING AN ARTICULATION LOCK, which was filed on Mar. 14, 2013, now U.S. Patent Application Publication No. 2014/0263541, is incorporated by reference herein. All of the embodiments disclosed herein are usable with the handle 110.

FIG. 79 depicts an exemplary surgical robot 500 configured to actuate a plurality of surgical tools, generally designated as 600, for example. The surgical robot 500 may be used in connection with a master controller, not shown, configured to allow a surgeon to control and view a surgical procedure being performed by the surgical robot 500. In various forms, the surgical robot 500 includes a base 510 from which, in the illustrated embodiment, three surgical tools 600 are supported, for example. In various forms, the surgical tools 600 are each supported by a series of articulatable linkages, generally referred to as arms 520, and are operably coupled with one or more drive systems 530. These structures are illustrated with protective covers which obscure much of the movable components thereof. These protective covers may be optional, and may be limited in size or entirely eliminated in some embodiments to minimize the inertia that is encountered by servo mechanisms used to manipulate the arms 520. In various forms, the surgical robot 500 has wheels that allow the surgical robot 500 to be positioned adjacent an operating table by a single attendant. FIG. 79 further illustrates a work envelope 700 of the surgical robot 500. The work envelope 700 refers to the range of movement of the surgical tools 600 of the surgical robot 500. The shape and size of the work envelope 700 depicted in FIG. 79 is merely illustrative. Thus, a work envelope is not limited to the specific size and shape of the sample work envelope depicted in FIG. 79 . The entire disclosure of U.S. Pat. No. 9,060,770, entitled ROBOTICALLY-DRIVEN SURGICAL INSTRUMENT WITH E-BEAM DRIVER, which issued on Jun. 23, 2015, is incorporated by reference herein. All of the embodiments disclosed herein are usable with the surgical robot 500.

FIGS. 80-86 depicts an anvil 5000 for use with a surgical stapling system. The anvil 5000 comprises a tissue-facing surface 5001, a longitudinal slot 5002 configured to receive a cutting member therein, and a plurality of forming pocket arrangements 5100 defined in the tissue-facing surface 5001. The forming pocket arrangements 5100 are arranged between a proximal end 5003 of the anvil 5000 and a distal end 5005 of the anvil 5000 in longitudinal rows on each side of the longitudinal slot 5002. The anvil 5000 comprises two inner longitudinal rows 5007 of forming pocket arrangements 5100 and two outer longitudinal rows 5009 of forming pocket arrangements 5100. Each forming pocket arrangement 5100 comprises a proximal forming pocket 5110 and a distal forming pocket 5130. The forming pockets 5110, 5130 are configured to accommodate and deform different types of staples. An instrument utilizing such forming pockets does not require a clinician to switch instruments during an operation in the event that the clinician needs to use a different type of staple, for example.

As mentioned above, the forming pocket arrangement 5100 is configured to deform a staple during a surgical stapling procedure. Referring primarily to FIGS. 81 and 82 , the forming pocket arrangement 5100 further comprises a bridge portion 5105 defined between the forming pockets 5110 and 5130. In this instance, the bridge portion 5105 is part of the tissue-facing surface 5001 of the anvil 5000. The forming pocket arrangement 5100 comprises a center “C” defined within the bridge portion 5105. The forming pocket arrangement 5100 is bilaterally symmetric with respect to the bridge portion 5105, bilaterally symmetric with respect to a lateral pocket axis that is perpendicular to axis LA-LA and extends through center “C”, and rotationally asymmetric with respect to the center “C”.

Referring to FIGS. 81 and 82 , each forming pocket 5110, 5130 comprises an upper filleted edge 5114, 5134, respectively, extending around the perimeter thereof. The edges 5114, 5134 provide a curved transition between the tissue-facing surface 5001 and the pockets 5110, 5130. Specifically, the edges 5114, 5134 transition the tissue-facing surface 5001 into pocket sidewalls 5113A, 5113B of the pocket 5110 and pocket sidewalls 5133A, 5133B of the pocket 5130. The edges 5114, 5134 also transition the tissue-facing surface 5001 into the entry and exit portions of the forming surfaces of each pocket 5110, 5130.

The sidewalls 5113A, 5133A are angled with respect to a longitudinal axis LA-LA of the anvil 5000. The sidewalls 5113B, 5133B comprise distinct sidewall portions 5121, 5122, 5123 and 5141, 5142, 5143, respectively. The sidewall portions 5121, 5141 are angled with respect to the longitudinal axis of the anvil 5000 at a different angle than the angle at which the sidewall portions 5113A, 5133A are angled with respect to the longitudinal axis. The sidewall portions 5122, 5142 are parallel, or at least substantially parallel, to the longitudinal axis LA-LA. In other words, the sidewall portions 5122, 5142 are at least substantially perpendicular to the tissue-facing surface 5001. The sidewall portions 5123, 5143 are parallel, or at least substantially parallel, to the sidewalls 5113A, 5133A, respectively. The sidewalls 5113A, 5113B, 5133A, 5133B are configured to direct the staple tips and the legs of the staples toward the forming surfaces of the pockets 5110, 5130 as well as help control the forming process of the staples, as discussed in greater detail below.

The sidewalls 5113A, 5113B, 5133A, 5133B extend from the upper transition edges 5114, 5134 to lower transition edges 5116, 5136. These edges 5116, 5136 provide a rounded, or smoothed, transition feature between the sidewalls 5113A, 5113B, 5133A, 5133B and the forming surfaces of each pocket 5110, 5130. The lower transition edges 5116, 5136 may comprise rounded and/or flat profiles.

The forming surfaces of the pockets 5110, 5130 comprise an entry zone forming surface 5111, 5131 and an exit zone forming surface 5112, 5132, respectively. The pockets 5110, 5130 further comprise a forming, or guiding, groove 5115, 5135 defined in the forming pockets 5110, 5130, respectively. The grooves 5115, 5135 extend parallel, or at least substantially parallel, to the longitudinal axis LA-LA of the anvil 5000. The pockets 5110, 5130 also comprise filleted transition edges extending around the perimeter of the grooves 5115, 5135, respectively, to provide a smooth a transition between the forming surfaces of the pockets 5110, 5130 and the grooves 5115, 5135.

As stated above, the forming pocket arrangements 5100 are configured to accommodate and deform different types of staples. To achieve this, the forming pockets 5110, 5130 each comprise dedicated landing, or target, zones LZ1, LZ2 configured to control the forming of a corresponding staple. The landing zones LZ1, LZ2 are laterally offset with respect to each other. The landing zones LZ1 are configured to receive staple legs of a first staple type and the landing zones LZ2 are configured to receive staple legs of a second staple type. Different staples may differ in size, manufacturing, and/or material, for example. In one instance, one staple type is a round-finish, wire staple and the other staple type is a flat-formed staple. Alternatively, the first staple type and the second staple type may comprise identical staples, however, the position of the staples in their respective staple cartridges relative to the forming pockets is different.

The landing zones LZ1 are located within entry portions 5115N, 5135N of the grooves 5115, 5135, respectively. Staple legs configured to land in the landing zones LZ1 are configured to form within the grooves 5115, 5135 and begin exiting their respective forming pockets 5110, 5130 at exit portions 5115X, 5135X of the grooves 5115, 5135, respectively. This path is labeled as PATH1 and is the intended path of the formation of the first staple type. Forming contact between the first staple type and the forming pockets 5110, 5130 may be confined to the grooves 5115, 5135. The landing zones LZ2 are located within the entry zone forming surfaces 5111, 5131 of the pockets 5110, 5130. Staple legs configured to land in the landing zones LZ2 are configured to form toward the sidewalls 5113A, 5133A. During forming, the sidewalls 5113A, 5133A are configured to direct the staple legs of the second staple type toward the center “C” of the forming pocket arrangement 5100 in a direction which is parallel, or at least substantially parallel, to the sidewalls 5113A, 5133A. Staple legs of the second staple type are configured to exit respective forming pockets 5110, 5130 at exit zone forming surfaces 5112, 5132. This path is labeled as PATH2 and is the intended path of the formation of the second staple type.

Multiple staple cartridges are configured to be used with the anvil 5000 of a surgical stapling system. A first staple cartridge 5010 and a second staple cartridge 5020 are illustrated in FIGS. 83 and 84 . The cartridges 5010, 5020 are illustrated adjacent to the anvil 5000 to show the alignment of the first cartridge 5010 relative to the anvil 5000 and, in addition, the alignment of the second cartridge 5020 and the anvil 5000. The staple cartridges 5010, 5020 comprise longitudinal slots 5012, 5022, respectively, which define longitudinal axes LA-LA which are aligned with the longitudinal axis LA-LA of the anvil 5000 when the staple cartridges 5010, 5020 are installed in the surgical stapling system.

The first staple cartridge 5010 comprises a tissue-facing surface 5011 and a plurality of staple cavities 5013 defined therein. The staple cavities 5013 are arranged in a plurality of rows. The first staple cartridge 5010 further comprises inner rows 5017 of staple cavities 5013 and outer rows 5019 of staple cavities 5013. Each staple cavity 5013 removably stores a staple 5014 therein. Each staple 5014 comprises a pair of staple legs each comprising a staple tip 5015. The staple tips 5015 within each row defines a row alignment axis. The tips 5015 of the staples 5014 stored within the inner rows 5017 of cavities 5013 define first row alignment axes 5016 and the tips 5015 of the staples 5014 stored within the outer rows 5019 of cavities 5013 define second row alignment axes 5018. As can be seen in FIG. 83 , when the first staple cartridge 5010 is installed in the surgical instrument system, the first row alignment axes 5016 and the second row alignment axes 5018 are aligned with the landing zones LZ1 of the rows 5007, 5009 of forming pockets 5110, 5130 of the anvil 5000 such that the staple tips 5015 are aiming toward the landing zones LZ1. When fired, the staples 5014 are configured to land in the landing zones LZ1 and form along the paths PATH1 (FIG. 81 ).

The second staple cartridge 5020 comprises a tissue-facing surface 5021 and a plurality of staple cavities 5023 defined therein. The staple cavities 5023 are arranged in a plurality of rows. The second staple cartridge 5020 further comprises inner rows 5027 of staple cavities 5023 and outer rows 5029 of staple cavities 5023. Each staple cavity 5023 removably stores a staple 5024 therein. Each staple 5024 comprises a pair of staple legs each comprising a staple tip 5025. The staple tips 5025 within each row defines a row alignment axis. The tips 5025 of the staples 5024 stored within the inner rows 5027 of cavities 5023 define first row alignment axes 5026 and the tips 5025 of the staples 5024 stored within the outer rows 5029 of cavities 5023 define second row alignment axes 5028. As can be seen in FIG. 84 , when the second staple cartridge 5020 is installed in the surgical instrument system, the first row alignment axes 5026 and the second row alignment axes 5028 are aligned with the landing zones LZ2 of the rows 5007, 5009 of forming pockets 5110, 5130 of the anvil 5000 such that the staple tips 5025 are aiming toward the landing zones LZ2. When fired, the staples 5024 are configured to land in the landing zones LZ2 and form along the paths PATH2 (FIG. 81 ). The first row alignment axes 5016 are positioned a distance d₁ from the longitudinal axis LA-LA. The first row alignment axes 5026 are positioned a distance d₂ from the longitudinal axis LA-LA. The distance d₁ is less than the distance d₂.

As discussed above, the forming pocket arrangements 5100 are configured to accommodate different types of staples and form those staples into different formed configurations. Referring now to FIGS. 85 and 86 , a first staple type and a second staple type are illustrated after being formed by a forming pocket arrangement 5100. FIG. 85 depicts a wire staple 5031 comprising a staple base 5032 and staple legs 5033 extending from the staple base 5032. An elevational view 5030 of the staple 5031 illustrates the staple 5031 in an unformed configuration, an elevational view 5030′ of the staple 5031 illustrates the staple 5031 in a formed configuration, and a plan view 5030″ of the staple 5031 illustrates the staple 5031 in the formed configuration. The staple 5031, formed with the landing zones LZ1 of one of the forming pocket arrangements 5100, is configured to form into a substantially planar configuration.

FIG. 88 depicts a stamped staple 5041 comprising a staple base 5042 defining a first plane and staple legs 5043 extending from the staple base 5042 and defining a second plane which is offset from the first plane. The staple 5041 has been formed from a flat sheet of metal. An elevational view 5040 of the staple 5041 illustrates the staple 5041 in an unformed configuration, an elevational view 5040′ of the staple 5041 illustrates the staple 5041 in a formed configuration, and a plan view 5040″ of the staple 5041 illustrates the staple 5041 in the formed configuration. The staple 5041, formed with the landing zones LZ2 of one of the forming pocket arrangements 5100, is configured to form into a substantially nonplanar configuration.

FIGS. 87-92 depict a forming pocket arrangement 5200 that is configured to deform a staple during a surgical stapling procedure. The forming pocket arrangement 5200 comprises a proximal forming pocket 5210 and a distal forming pocket 5230 defined in a planar, or tissue-contacting, surface 5203 of an anvil 5201. The forming pockets 5210, 5230 are configured to accommodate and deform different types of staples. As opposed to the embodiment described above, the staple tips of a first staple type in a first cartridge are the same distance from a central longitudinal axis of the first cartridge as the distance between the staple tips of a second staple type in a second cartridge and a longitudinal axis of the second cartridge. The forming pocket arrangement 5200 further comprises a bridge portion 5205 defined between the forming pockets 5210, 5230. In this instance, the bridge portion 5205 is recessed with respect to the planar surface 5203 of the anvil 5201. The forming pocket arrangement 5200 comprises a center “C” defined within the bridge portion 5205. The forming pocket arrangement 5200 is bilaterally symmetric with respect to the bridge portion 5205, bilaterally symmetric with respect to pocket axis 5203, and rotationally symmetric with respect to the center “C”.

The forming pocket 5210 comprises a pair of pocket sidewalls 5213 and the forming pocket 5230 comprises a pair of pocket sidewalls 5233. The pocket sidewalls 5213, 5233 are angled with respect to the planar surface 5203 and are configured to direct the staple tips and the legs of the staples toward the forming surfaces of the pockets 5210, 5230. The sidewalls 5213, 5233 extend between the planar surface 5203 of the anvil 5201 and the forming surfaces of the pockets 5210, 5230. The pocket sidewalls 5213, 5233 cooperate to funnel corresponding staple tips toward the lateral center of the pockets 5210, 5230.

The pockets 5210, 5230 comprise an entry zone 5211, 5231 and an exit zone 5212, 5232, respectively. The pockets 5210, 5230 further comprise a system of grooves configured to accommodate and receive different types of staples and form those staples into different 2-dimensional configurations. The pockets 5210, 5230 comprise first grooves 5225, 5245, respectively, defined in the forming surfaces thereof. The grooves 5225, 5245 comprising concave walls 5227, 5247 extending between the sidewalls 5213, 5233 and convex walls 5226, 5236. The first grooves 5225, 5245 are configured receive, guide, and form a first staple type. The pockets 5210, 5230 further comprise second grooves 5215, 5235, respectively, defined, or nested, within the first grooves 5225, 5245. The grooves 5215, 5235 comprise concave walls 5217, 5237 extending between the convex walls 5226, 5236 and bottom surfaces 5216, 5236. The second grooves 5215, 5235 are configured receive, guide, and form a second staple type. The second staple type is configured to bypass the first grooves 5225, 5245.

Referring to FIG. 89 , a first groove within a single pocket may comprise a first entry radius of curvature which is different than a second entry radius of curvature of a second groove. The first groove may comprise a first exit radius of curvature which is different than a second exit radius of curvature of the second groove. For example, referring to the proximal forming pocket 5210, the bottom surface 5216 of the groove 5215 comprises a first entry radius of curvature corresponding to the entry zone 5211 and a first exit radius of curvature corresponding to the exit zone 5213 while the groove 5225 comprises a second entry radius of curvature corresponding to the entry zone 5211 and a second exit radius of curvature corresponding to the exit zone 5213.

The first entry and exit radii of curvature of the first grooves can comprise a different ratio than the ratio of the second entry and exit radii of curvature of the second grooves. On the other hand, the ratio of the first entry and exit radii of curvature may be identical to the ratio of the second entry and exit radii of curvature. In such embodiments, the grooves are vertically offset with respect to each other an equal distance along the length of the pocket. Further to the above, the grooves 5215, 5225, 5235, 5245 can vary in width, or diameter, along the length of the pockets owing to different widths between groove walls. Conversely, the grooves 5215, 5225, 5235, 5245 can comprise a uniform width, or diameter, along the length of the pockets.

Referring to FIG. 90 , a profile S1 of round staple and a profile S2 of a stamped, or flat-form, staple are illustrated. The round staple S1 is configured to be received by the groove 5235 and the flat form staple S2 is configured to be received by the groove 5245. In certain instances, the flat form staple S2 is unable to enter the groove 5235 because the staple S2 is wider than the groove 5235. In at least one instance, the round staple comprises a diameter of about 0.007 inches and the flat-form staple may comprises a width, or overall diameter, of about 0.010 inches, for example. By controlling which groove can form which staple with the forming pocket arrangement 5200, various features, such as the entry and exit radii of curvature, can be varied between the grooves 5215, 5225 and between the grooves 5235, 5245 to control how the staple legs of the different staples are formed.

Further to the above, the grooves 5215, 5225, 5235, 5245 can comprise smoothed transition features between the grooves 5215, 5225, 5235, 5245 themselves and between the grooves 5215, 5225, 5235, 5245 and the edges of the pockets 5210, 5230. These smoothed transition features are positioned near the entry and/or exit portions of each groove 5215, 5225, 5235, 5245 so as to eliminate unwanted catching of the staple on the pocket edges during forming.

FIGS. 93-95 depict a first staple 5250 and a second staple 5260 to be formed with the forming pocket arrangement 5200. The first staple 5250 is smaller than the second staple 5260. Specifically, the wire diameter of the first staple 5250 is smaller than the wire diameter of the second staple 5260, the unformed height of the first staple 5250 is smaller than unformed height of the second staple 5260, and the distance between the staple tips of the first staple 5250 is less than the distance between the staple tips of the second staple 5260. The first staple 5250 comprises a staple crown 5251 and staple legs 5253 extending from the staple crown 5251. Each staple leg 5253 comprises a staple tip 5253 configured to contact the first landing zone LZ1 of a corresponding forming pocket 5210, 5230. The second staple 5260 comprises a staple crown 5261 and staple legs 5263 extending from the staple crown 5261. Each staple leg 5263 comprises a staple tip 5263 configured to contact the second landing zone LZ2 of a corresponding forming pocket 5210, 5230. The difference in groove depth between the landing zones LZ1, LZ2 discussed above can allow the first staple 5250 to form into a first B-form configuration (FIG. 94 ) and the second staple 5260 to form into a second B-form configuration (FIG. 95 ) which has a different formed height than the formed height of the first staple 5250.

As staples are ejected from a staple cartridge into tissue, tissue may flow, or move, causing the staples to deflect, or bend. This tissue movement may be caused by the advancement of the knife pushing the tissue distally. If the tissue bends staple legs distally the staple legs and, thus, the staple tips of those staple legs, may be driven off-target with respect to their intended staple forming pockets. FIG. 96 depicts a surgical stapling arrangement 5300. An anvil 5301 of the arrangement 5300 is configured to allow for tissue movement and staple leg deflection of different types of staples. The anvil 5301 comprises a proximal forming pocket 5310 and a distal forming pocket 5330. A first staple 5350 configured to be formed against the anvil 5301 comprises a staple base 5351 and staple legs 5352 extending from the staple base 5351. Each leg 5352 comprise a staple tip 5353. A second staple 5360 configured to be formed against the anvil 5301 comprises a staple base 5361 and staple legs 5362 extending from the staple base 5361. Each leg 5362 comprise a staple tip 5363.

A thinner-diameter staple 5350, for example, may deflect more than a thicker-diameter staple 5360, for example (see deflected representation of legs 5352′, 5362′ and tips 5353′, 5363′ which are illustrated in phantom in FIG. 96 ). This anticipated deflection can be accounted for by increasing the longitudinal capture distance of a pair of forming pockets 5310, 5330 while still maintaining a centered alignment between the center of the staple bases and a central axis CA-CA of the forming pockets 5310, 5330. The longitudinal capture distance can be defined as the distance between a proximal edge, or entry edge, of the proximal forming pocket 5310 and a distal edge, or entry edge, of the distal forming pocket 5330. Another solution to accommodating longitudinal leg deflection may include adjusting the relative position of the staples 5350, 5360 and the forming pockets 5310, 5330. For example, staples anticipated to deflect more than other staples may be positioned further proximally within their staple cartridge to allow for distal deflection of the legs. Positioning these staples more proximally may result in off-axis positioning of the staples relative to the central axis CA-CA of the forming pockets. In other words, the center of the staple bases will not be in a centered alignment with the central axis CA-CA.

FIGS. 97-100 depict a laminated, or layered, anvil 5400 comprising forming pockets 5410. The laminated anvil 5400 comprises a plurality of horizontal layers 5403A, 5403B, 5403C, 5403D, 5403E, 5403F, 5403G, 5403H. The layers 5403A, 5403B, 5403C, 5403D, 5403E, 5403F, 5403G, 5403H can be laser-cut, for example, and can be assembled by welding, and/or adhesive, for example. Another method for assembling the layers 5403A, 5403B, 5403C, 5403D, 5403E, 5403F, 5403G, 5403H can include press-fit pins. Certain layers of the layers 5403A, 5403B, 5403C, 5403D, 5403E, 5403F, 5403G, 5403H can be designed to move, or give, to impart specific staple forming reactions. Edges of any of the layers 5403A, 5403B, 5403C, 5403D, 5403E, 5403F, 5403G, 5403H can be formed into smooth edges.

FIG. 101 is a cross-sectional view of a laminated, or layered, anvil 5410 comprising a forming pocket 5411. The laminated anvil 5410 comprises a plurality of vertical layers 5413A, 5413B, 5413C, 5413D, 5413E, 5413F, 5413G, 5413H, 5413I, 5413J, 5413K, 5413L, 5413M, 5413N, 5403O. The layers 5413A, 5413B, 5413C, 5413D, 5413E, 5413F, 5413G, 5413H, 5413I, 5413J, 5413K, 5413L, 5413M, 5413N, 5403O can be laser-cut, for example, and can be assembled by welding, and/or adhesive, for example. Another method for assembling the layers 5413A, 5413B, 5413C, 5413D, 5413E, 5413F, 5413G, 5413H, 5413I, 5413J, 5413K, 5413L, 5413M, 5413N, 5403O can include press-fit pins. Certain layers of the layers 5413A, 5413B, 5413C, 5413D, 5413E, 5413F, 5413G, 5413H, 5413I, 5413J, 5413K, 5413L, 5413M, 5413N, 5403O can be designed to move, or give, to impart specific staple forming reactions. Edges of any of the layers 5413A, 5413B, 5413C, 5413D, 5413E, 5413F, 5413G, 5413H, 5413I, 5413J, 5413K, 5413L, 5413M, 5413N, 5403O can be formed into smooth edges. Certain layers, such as layers 5413G, 5413H, 5413I, for example, can be configured to control and guide a staple leg during forming.

FIG. 102 depicts a staple 5420. The staple 5420 comprises a staple crown 5421 and staple legs 5422, 5424 extending from the crown 5421. The staple leg 5422 comprises a laterally cut staple tip 5423. The staple tip 5423 is cut at a first angle. The staple leg 5424 comprises a laterally-cut staple tip 5425. The staple tip 5425 is cut at a second angle which is different than the first angle. Both staple tips 5423, 5425 face a direction which is perpendicular, or at least substantially perpendicular, to an axis defined by the crown 5421. Laterally-cut staple tips can help staples target specific areas of their respective forming pockets. For example, with forming pockets configured to form different types of staples, the staples may be cut with opposite laterally-facing staple tips, for example, facing in a direction that is opposite the lateral direction, such that one staple can be biased toward a first portion of the pocket and the other staple can be biased toward a different portion of the pocket. As discussed above, various surgical systems comprise an anvil movable between an open position and a closed position. Sometimes, however, the anvil may not be fully closed or is not fully closeable. For instance, the tissue captured between the anvil and the staple cartridge may be too thick to fully close the anvil. As a result, the anvil may be angled, or cambered, during a firing stroke which effects how the staples from the staple cartridge are formed against the anvil.

FIGS. 103 and 104 depict a surgical stapling assembly 5500 comprising a staple 5505, a staple cartridge 5501 in which the staple 5505 is removably stored, and an anvil 5520 configured to deform the staple 5505. The staple 5505 comprises a staple base 5506 and staple legs 5507 extending from the staple base 5506. Each staple leg 5507 comprises a staple tip 5508. The staple 5505 is removably stored within a staple cavity 5503 of the cartridge 5501. The staple cartridge 5501 comprises a staple driver 5510 comprising a drive surface, or cradle, 5511 configured to drive the staple toward the anvil 5520. In some instances, the anvil 5520 may be angled at angle θ₁ relative to a datum parallel to a tissue-facing surface 5502 of the cartridge 5501. To accommodate for this angle, the drive surface 5511 of the staple driver 5510 is angled at angle θ₁. As a result, when the staple 5505 is driven into forming pockets 5522 of the anvil 5520, the staple tips 5508 can contact the pockets 5522 at the same time, or at best, substantially the same time. This can prevent one staple leg from being formed more than the other staple leg.

FIG. 105 depicts a surgical stapling assembly 5600 comprising a flat-form staple 5630, a staple cartridge 5610 in which the staple 5630 is removably stored, and an anvil 5620 configured to deform the staple 5630. The staple 5600 comprises a proximal staple leg 5632 comprising a proximal staple tip 5633. The proximal staple tip 5633 is cut at angle θ_(P) relative to a datum parallel to a tissue-facing surface 5611 of the cartridge 5610. The staple 5600 comprises a distal staple leg 5634 comprising a distal staple tip 5635 angled relative to the distal staple leg 5634 at angle θ_(D2). The distal staple tip 5635 is cut at angle θ_(D1) relative to a datum parallel to the tissue-facing surface 5611 of the cartridge 5610.

The staple 5630 is removably stored within a staple cavity 5612 of the cartridge 5610. The staple 5630 is configured to be driven toward the anvil 5620 by a sled 5613 of the staple cartridge 5610. The anvil 5620 comprises a tissue-facing surface 5621 and a forming pocket arrangement 5623 defined in the tissue-facing surface 5621. The forming pocket arrangement 5623 comprises a proximal forming pocket 5624 and a distal forming pocket 5625. In this instance, the pocket arrangement 5623 defines a pocket plane 5626 that is parallel to the tissue-facing surface 5621 of the anvil 5620. The pocket plane 5626 is defined by the deepest portions, or valleys, of each forming pocket 5624, 5625 of the pocket arrangement 5623. In this instance, the anvil 5520 is cambered at angle θ₁ relative to the tissue-facing surface 5611 of the cartridge 5610. The staple 5630 is configured to accommodate for this anvil camber by having, one, a distal staple leg 5634 longer than the proximal staple leg 5632 and, two, a specifically-angled distal staple tip 5635 having a specifically-angled tip surface. When driven into forming pockets 5624, 5625 of the anvil 5620 angled at angle θ₁, the staple 5630 can be formed into a desirable formed configuration even when the anvil is cambered.

FIG. 106 depicts a surgical stapling assembly 5700 comprising a flat-form staple 5730, a staple cartridge 5710 in which the staple 5730 is removably stored, and an anvil 5720 configured to deform the staple 5730. The staple 5700 comprises a staple base 5731 and staple legs 5732 extending from the staple base 5731. Each staple leg 5732 comprises a staple tip 5733. The staple 5730 is removably stored within a staple cavity 5712 of the cartridge 5710. The staple 5730 is configured to be driven toward the anvil 5720 by a sled 5713 of the staple cartridge 5710. The anvil 5720 comprises a tissue-facing surface 5721 and a forming pocket arrangement 5723 defined in the tissue-facing surface 5721. The forming pocket arrangement 5723 comprises a proximal forming pocket 5724 and a distal forming pocket 5725. In this instance, the pocket arrangement 5723 defines a pocket plane 5726 that is parallel to the tissue-facing surface 5711 of the cartridge 5710. The pocket plane 5726 is defined by the deepest portions, or valleys, of each forming pocket 5724, 5725 of the pocket arrangement 5723. The distal pocket 5725 is shallower than the proximal pocket 5724. In this instance, the anvil 5720 is cambered at angle θ₁ relative to the tissue-facing surface 5711 of the cartridge 5710. The forming pocket arrangement 5723 is configured to accommodate for this anvil camber by having a pocket plane 5726 which is parallel, or at least substantially parallel, to the tissue-facing surface 5711 of the cartridge 5710. When driven into forming pockets 5724, 5725 of the anvil 5720 angled at angle θ₁, the staple 5730 can be formed into a desirable formed configuration even when the anvil is cambered.

FIGS. 107 and 108 depict an anvil 5800 of a surgical stapling system configured to deform surgical staples during a stapling procedure. The anvil 5800 comprises a tissue-facing surface 5801, a longitudinal slot 5802 configured to receive a firing member, and a plurality of forming pocket arrangements 5810 configured to deform staples driven into the forming pocket arrangements 5810. The forming pocket arrangements 5810 are bilaterally asymmetric and each forming pocket arrangement 5810 comprises a proximal forming pocket 5811 and a distal forming pocket 5813. The proximal forming pockets 5811 comprise a trough, or valley, deeper than a trough, or valley, of the distal forming pockets 5813. Such an arrangement can accommodate anvil camber. When anvil camber is not present, the distal forming pockets 5813 are configured to provide a smaller forming gap than the proximal forming pockets 5811. The anvil 5800 comprises inner longitudinal rows 5805 of forming pocket arrangements 5810 and outer longitudinal rows 5807 of forming pocket arrangements 5810.

FIG. 109 depicts an anvil 5800′ similar to the anvil 5800 in many respects. The anvil 5800′ comprises forming pocket arrangements 5810′ individually angled with respect to a datum plane 5815′ of the anvil 5800′. The forming pocket arrangements 5810′ are bilaterally asymmetric and comprise a proximal forming pocket 5811′ and a distal forming pocket 5813′. The proximal forming pockets 5811′ comprise a trough, or valley, deeper than a trough, or valley, of the distal forming pockets 5813′. Such an arrangement can accommodate anvil camber. When anvil camber is not present, the distal forming pockets 5813′ are configured to provide a smaller forming gap than the proximal forming pockets 5811′. Such an arrangement can also accommodate staple roll, for example, rotation of a staple relative to the anvil.

FIGS. 110 and 111 depict an anvil 5900 of a surgical stapling system configured to deform surgical staples during a stapling procedure. The anvil 5900 comprises a tissue-facing surface 5901, a longitudinal slot 5902 configured to receive a firing member, and a plurality of forming pocket arrangements 5910 configured to deform staples driven into the forming pocket arrangements 5910. The anvil 5900 further comprises a proximal end 5903 and a distal end 5905. The forming pocket arrangements 5910 are configured to form different types of staples. Each forming pocket arrangement 5910 comprises a tissue-facing surface 5911 that is individually angled with respect to the tissue-facing surface 5901 of the anvil 5900. Such an arrangement can accommodate anvil camber. When anvil camber is not present, the distal forming pockets of the forming pocket arrangements 5910 are configured to provide a smaller tissue gap, and smaller forming gap, than the proximal forming pockets of the forming pocket arrangements 5910. The anvil 5900 comprises inner longitudinal rows 5907 of forming pocket arrangements 5910 and outer longitudinal rows 5909 of forming pocket arrangements 5910.

FIG. 112 depicts an anvil 5900′ similar to the anvil 5900 in many respects. The anvil 5900′ comprises a plurality of forming pocket arrangements 5910′. Each forming pocket arrangement 5910′ comprises a tissue-facing surface 5911′ that is individually angled with respect to a datum plane 5915′ of the anvil 5900′ in a progressive manner. The forming pocket arrangements 5910′ near the proximal end 5903′ of the anvil 5900′ are angled less than the forming pocket arrangements 5910′ near the distal end of the anvil 5900′. Such an arrangement can accommodate anvil camber.

FIG. 113 depicts a stapling system 6000 comprising the anvil 5000 of FIG. 80 , a first staple leg 6001 comprising a first staple tip 6003, and a second staple leg 6005 comprising a second staple tip 6007. The first staple tip 6003 is laterally cut such that the first staple leg 6001 can target, and be biased toward, a first portion of the staple pocket 5130. The second staple tip 6007 is laterally cut such that the second staple leg 6005 can target, and be biased toward, a second portion of the staple pocket 5130.

FIG. 114 depicts a first flat-form staple 6110, a second flat-form staple 6120, and a third flat-form staple 6130 comprising features for encouraging the staples 6110, 6120, 6130 toward specific locations of their respective forming pockets. The first staple 6110 comprises a staple base 6111 which defines a base axis BA and at least one staple leg 6112 extending from the staple base 6111 which defines a leg axis LA. The staple leg 6112 comprises a staple tip 6113 cut such that the staple tip 6113 comprises a longitudinally-facing staple tip face. The second staple 6120 comprises a staple base 6121 which defines a base axis BA and at least one staple leg 6122 extending from the staple base 6121 which defines a leg axis LA. The leg 6122 is angled at angle θ₁ with respect to the base 6121. The staple leg 6122 comprises a staple tip 6123 cut such that the staple tip 6123 comprises a longitudinally-facing staple tip face. The third staple 6130 comprises a staple base 6131 which defines a base axis BA and at least one staple leg 6132 extending from the staple base 6131 which defines a leg axis LA. The staple leg 6132 comprises a staple tip 6133 cut such that the staple tip 6123 comprises a longitudinally-facing staple tip face. The staple tip 6133 is angled at angle θ₂ with respect to the leg 6132 and defines a tip axis TA.

Specific features of the staples of FIG. 114 can cause the staples to target certain portions of their respective forming pockets. FIG. 115 depicts a stapling system 6200 comprising a staple cartridge 6210 including a staple cavity 6212 configured to removably store the staple 6120. The stapling system 6200 further comprises an anvil 6220 configured to form the staple 6120 when the staple 6120 is ejected from the staple cartridge 6210 by a staple driver 6211 of the staple cartridge 6210. When ejected from the staple cartridge 6210, the unformed configuration of the staple 6120 causes the staple leg 6122 to bias in a lateral direction to target a landing zone 6224 of the staple pocket 6222 defined in a tissue-facing surface 6221 of the anvil 6220. The staple pocket 6222 comprises a groove 6223 which is configured to control a second stage of forming after the staple tip 6123 contacts the landing zone 6224.

FIG. 116 depicts a stapling system 6300 comprising a staple cartridge 6310 including a staple cavity 6312 configured to removably store the staple 6130. The stapling system 6300 further comprises an anvil 6320 configured to form the staple 6130 when the staple 6130 is ejected from the staple cartridge 6310 by a staple driver 6311 of the staple cartridge 6310. The unformed configuration of the staple 6130 causes the staple tip 6133 of the staple leg 6132 to target a targeting zone 6324 of the staple pocket 6322 defined in a tissue-facing surface 6321 of the anvil 6320. The staple pocket 6322 comprises a groove 6323 which is configured to control a second stage of forming after the staple tip 6133 contacts the targeting zone 6324.

FIGS. 117 and 118 depict a stapling system comprising a staple cartridge 6400 and an anvil 6420. The staple cartridge 6400 comprises a cartridge body 6401 comprising a longitudinal slot 6402 and a tissue-facing surface 6403. The staple cartridge 6400 further comprises a plurality of staple cavities 6405 defined in the cartridge body 6401 which are arranged in inner rows 6407 of cavities 6405 and outer rows 6409 of cavities 6405. Each staple cavity 6405 comprises staple leg cavity portions 6406. The staple cavities 6405 are configured to removably store non-planar staples therein.

The anvil 6420 comprises a plurality of forming pockets 6425 arranged in inner rows 6427 of forming pockets 6425 and outer rows 6429 corresponding to the inner rows 6407 of cavities 6405 and outer rows 6409 of cavities 6405, respectively. The leg cavity portions 6406 of the inner rows 6407 define inner row staple tip axes 6426 with which the inner rows 6427 of forming pockets 6425 are aligned. Similarly, the leg cavity portions 6406 of the outer rows 6409 define outer row staple tip axes 6428 with which the outer rows 6429 of forming pockets 6425 are aligned.

FIGS. 119 and 120 depict a stapling system comprising a staple cartridge 6500 and an anvil 6540. The staple cartridge 6500 comprises a cartridge body 6501 including a longitudinal slot 6502 and a tissue-facing surface 6503. The staple cartridge 6500 further comprises a proximal portion 6507, a distal portion 6509, and a cavity 6510 defined in the cartridge body 6501 on each side of the longitudinal slot 6502. Each cavity 6510 is configured to store two rows of non-planar staples in a staple base-to-staple base arrangement. This staple base-to-staple base arrangement allows the rows of staples to be closer together in the cartridge. The rows closer to the longitudinal slot 6502 are oriented such that the legs of the staples in the inner rows face the longitudinal slot 6502. On the other hand, the rows further from the longitudinal slot 6502 are oriented such that the legs of the staples in the outer rows face away from the longitudinal slot 6502. Each staple cavity 6510 comprises staple leg cavity portions 6511 configured to store the legs 6521 of the inner rows of staples 6520 and staple leg cavity portions 6513 configured to store the legs 6531 of the outer rows of staples 6530.

The anvil 6540 comprises a plurality of forming pockets 6543 arranged in inner rows 6545 of forming pockets 6543 and outer rows 6547 of forming pockets 6543 corresponding to the inner rows of staples 6520 and outer rows of staples 6530, respectively. The leg cavity portions 6511 define inner row staple tip axes 6546 with which the inner rows 6545 of forming pockets 6543 are aligned. Similarly, the leg cavity portions 6513 define outer row staple tip axes 6548 with which the outer rows 6547 of forming pockets 6543 are aligned.

Referring now to FIG. 121 , the anvil 6420 and the anvil 6540 are compared to illustrate the difference in overall anvil widths. For illustration purposes, the longitudinal axes LA-LA of the anvils 6420, 6540 are aligned. The inner rows 6427 of forming pockets 6425 are positioned a distance 6551 from the longitudinal axis LA-LA. The inner rows 6545 of forming pockets 6543 are positioned a distance 6552 from the longitudinal axis LA-LA. The distance 6552 is less than the distance 6551. Similarly, the outer rows 6429 of forming pockets 6425 are positioned a distance 6553 from the longitudinal axis LA-LA. The outer rows 6547 of forming pockets 6543 are positioned a distance 6554 from the longitudinal axis LA-LA. The distance 6554 is less than the distance 6553. As a result, the overall width 6556 of the anvil 6540 is less than the overall width 6555 of the anvil 6420.

FIG. 122 depicts a non-planar staple 6600. The staple 6600 can be used with the cartridge 6500 in addition to, or in lieu of, the staples 6530. The staple 6600 comprises a proximal staple base 6601 and a distal staple base 6611. The proximal staple base 6601 comprises a proximal staple leg 6603 and a distal staple leg 6605 extending from the proximal staple base 6601. The distal staple base 6611 comprises a proximal staple leg 6613 and a distal staple leg 6615 extending from the distal staple base 6611. The staple bases 6601, 6611 may be connected, or attached, to each other forming one unitary staple base. The legs 6603, 6605, 6613, 6615 extend outwardly with respect to the bases 6601, 6611. In other instances, the 6603, 6605, 6613, 6615 may extend inwardly with respect to the bases 6601, 6611. In other words, the legs 6603, 6605 may face the legs 6613, 6615. In either event, the legs 6603, 6605, 6613, 6615 are deformable by the forming pockets of an anvil.

FIG. 123 depicts a staple 6700. The staple 6700 comprises a first base portion 6701 and a second base portion 6711 positioned adjacent the first base portion 6701. The staple 6700 is bilaterally symmetric with respect to a longitudinal axis defined at the attachment, or joined portion, of the bases 6701, 6711. The staple 6700 comprises a proximal staple leg 6703 extending from the staple base 6701 and a proximal staple leg 6713 extending from the staple base 6711. The staple 6700 further comprises a distal staple leg 6705 extending from the staple base 6701 and a distal staple leg 6713 extending from the staple base 6711. The staple 6700 can be formed with a single forming pocket arrangement such that, the legs 6703, 6705 form into a first configuration and the legs 6713, 6715 form into a second configuration which is different than the first configuration. For example, the first configuration may comprise a configuration where, when formed, the legs 6703, 6705 define a plane at least substantially parallel to the base 6701 and, similarly, the second configuration may comprise a configuration where, when formed, the legs 6713, 6715 define individual planes which intersect the base 6711.

FIGS. 124-127 depict a staple 6800. The staple 6800 comprises a staple crown 6801 having a drive surface 6802. The staple 6800 further comprises a first proximal leg 6803 extending from the crown 6801 in a first direction and a second proximal leg 6805 extending from the crown 6801 in a second direction opposite the first direction. The legs 6803, 6805 define a plane 6804 angled with respect to a plane defined by the base 6801. The staple 6800 further comprises a first distal leg 6807 extending from the crown 6801 and a second distal leg 6809 extending from the crown 6801. The legs 6807, 6809 define a plane 6808 angled with respect to the base 6801. The proximal staple legs 6803, 6805 comprise staple tips 6810 having proximally-facing staple tip faces. The distal staple legs 6807, 6809 comprise staple tips 6820 having distally-facing staple tip faces.

FIG. 128 depicts a staple 6900. The staple 6900 comprises a staple crown 6901 having a drive surface 6902. The staple 6900 further comprises a first proximal leg 6903 extending from the crown 6901 and a second proximal leg 6905 extending from the crown 6901. The staple 6900 further comprises a first distal leg 6913 extending from the crown 6901 and a second distal leg 6915 extending from the crown 6901. The legs 6903, 6905, 6913, 6915 are parallel, or at least substantially parallel. The proximal staple leg 6903 and the distal staple leg 6913 comprise staple tips 6906, 6916, respectively, each having laterally-facing staple tip faces facing a first direction. The proximal staple leg 6905 and the distal staple leg 6915 comprise staple tips 6904, 6914, respectively, each having laterally-facing staple tip faces facing a second direction.

EXAMPLES

Example 1—A surgical instrument comprising a first jaw, a second jaw, and a closure tube. The first jaw comprises a first proximal end and a first distal end. The second jaw comprises a second proximal end, a second distal end, a pivot pin about which the second jaw is rotatable relative to the first jaw between an open and a fully-closed position, and a cam surface. The closure tube is movable toward the first distal end of the first jaw during a closure stroke. The closure tube comprises a distal tube end configured to engage the cam surface and move the second distal end of the second jaw toward the first distal end of the first jaw during the closure stroke. The closure tube further comprises a wedge configured to engage the pivot pin and tilt the second distal end of the second jaw toward the first distal end during the closure stroke.

Example 2—The surgical instrument of Example 1, wherein a distal tissue gap is defined between the first distal end and the second distal end when the second jaw is in the fully-closed position, wherein a proximal tissue gap is defined between the first proximal end and the second proximal end when the second jaw is in the fully-closed position, and wherein the second jaw applies a larger clamping force to the tissue captured in the distal tissue gap than the proximal tissue gap.

Example 3—The surgical instrument of Examples 1 or 2, wherein the surgical instrument further comprises a staple cartridge including staples removably stored therein.

Example 4—The surgical instrument of Example 3, wherein the surgical instrument further comprises a firing member configured to eject the staples from the staple cartridge, wherein the firing member comprises a first cam configured to engage the first jaw and a second cam configured to engage the second jaw during a firing stroke, and wherein the first cam and the second cam are configured to co-operatively control a tissue gap between the first jaw and the second jaw.

Example 5—The surgical instrument of Example 4, wherein the second jaw further comprises a tissue compression surface, staple forming pockets defined in the tissue compression surface, and a second cam surface, wherein the second cam is configured to engage the second cam surface during the firing stroke to control the position, and wherein the tissue compression surface is not parallel to the second cam surface.

Example 6—The surgical instrument of Example 5, wherein a first distance is defined between the tissue compression surface and the second cam surface at the second proximal end of the second jaw, wherein a second distance is defined between the tissue compression surface and the second cam surface at the second distal end of the second jaw, and wherein the second distance is larger than the first distance.

Example 7—The surgical instrument of Examples 1, 2, 3, 4, 5, or 6, wherein the distal tube end is configured to engage the cam surface of the second jaw before the wedge engages the pivot pin during the closure stroke.

Example 8—The surgical instrument of Examples 1, 2, 3, 4, 5, 6, or 7, wherein the first jaw comprises a vertical slot, and wherein the pivot pin is slidably positioned in the vertical slot.

Example 9—The surgical instrument of Example 8, wherein the first jaw comprises a longitudinal slot, wherein the wedge is slidably positioned in the longitudinal slot, and wherein the longitudinal slot is in communication with the vertical slot.

Example 10—The surgical instrument of Examples 1, 2, 3, 4, 5, 6, 7, or 8, wherein the wedge does not move the second proximal end relative to the first proximal end.

Example 11—A surgical instrument comprising a first jaw, a second jaw, and a closure tube. The first jaw comprises a first proximal end and a first distal end. The second jaw comprises a second proximal end, a second distal end, a pivot pin about which the second jaw is rotatable relative to the first jaw between an open position and a fully-closed position, and a cam surface. The closure tube is movable toward the first distal end of the first jaw during a closure stroke. The closure tube comprises a distal tube end configured to engaged the cam surface and move the second distal end of the second jaw toward the first distal end of the first jaw during the closure stroke and a wedge configured to engage the pivot pin and push the second distal end of the second jaw toward the first distal end of the first jaw during the closure stroke to achieve the fully-closed position.

Example 12—The surgical instrument of Example 11, wherein the wedge does not move the second proximal end relative to the first proximal end.

Example 13—A surgical instrument comprising a first jaw, a second jaw, a closure tube, and a cutting member. The first jaw comprises a distal jaw end. The second jaw is movable relative to the first jaw between an open position and a closed position. The second jaw comprises a closure cam surface and an opening cam surface. The closure tube is movable toward the distal jaw end during a closure stroke. The closure tube comprises a distal tube end configured to engage the closure cam surface and move the second jaw into the closed position during the closure stroke. The cutting member is movable toward the distal jaw end during a cutting stroke and movable away from the distal jaw end during a retraction stroke. The cutting member comprises a proximal portion, a distal portion, and a biasing member positioned intermediate the proximal portion and the distal portion, wherein the biasing member is configured to bias the distal portion into engagement with the opening cam surface of the second jaw to at least partially open the second jaw after the retraction stroke.

Example 14—The surgical instrument of Example 13, wherein the closure tube is movable away from the distal jaw end during an opening stroke, and wherein the closure tube holds the second jaw in the closed position against the bias of the biasing member until the distal tube end is disengaged from the closure cam surface.

Example 15—The surgical instrument of Examples 13 or 14, wherein the surgical instrument further comprises a staple cartridge comprising staples removably stored therein, and wherein the cutting member is configured to eject the staples from the staple cartridge during the cutting stroke.

Example 16—The surgical instrument of Examples 13, 14, or 15, wherein the cutting member comprises a first cam configured to engage the first jaw and a second cam configured to engage the second jaw, and wherein the first jaw and the second jaw co-operatively control the position of the second jaw relative to the first jaw during the cutting stroke.

Example 17—A surgical instrument comprising a first jaw comprising a distal jaw end, a second jaw, and a cutting member. The second jaw is movable relative the first jaw to capture the tissue of a patient between the first jaw and the second jaw. The cutting member is movable toward the distal jaw end during a cutting stroke. The cutting member comprises a coupling portion comprising a first cam configured to engage the first jaw and a second cam configured to engage the second jaw during the cutting stroke and a bar comprising a plurality of layers attached to the coupling portion, wherein the bar comprises a cutting edge configured to cut the patient tissue during the cutting stroke.

Example 18—The surgical instrument of Example 17, wherein the surgical instrument further comprises a staple cartridge including staples removably stored therein, and wherein the cutting member is configured to eject the staples from the staple cartridge during the cutting stroke to staple the patient tissue.

Example 19—The surgical instrument of Examples 17 or 18, wherein the coupling portion further comprises a mounting recess, and wherein the bar comprises a distal bar end positioned in the mounting recess.

Example 20—The surgical instrument of Example 19, wherein the coupling portion further comprises a mounting projection within the mounting recess, and wherein the bar comprises a mounting aperture configured to closely receive the mounting projection.

Example 21—The surgical instrument of Examples 17, 18, 19, or 20, wherein the coupling portion further comprises a plurality of mounting projections, and wherein the bar comprises a plurality of mounting apertures configured to receive the mounting projections.

Example 22—The surgical instrument of Example 21, wherein the cutting member is movable along a longitudinal axis during the cutting stroke, and wherein the plurality of mounting projections comprises a first projection positioned along the longitudinal axis and a second projection positioned offset from the longitudinal axis.

Example 23—The surgical instrument of Examples 21 or 22, wherein the cutting member is movable along a longitudinal axis during the cutting stroke, and wherein the plurality of mounting projections comprises a first projection positioned on a first side of the longitudinal axis and a second projection positioned on a second side of the longitudinal axis.

Example 24—The surgical instrument of Examples 21, 22, or 23, wherein the plurality of mounting projections comprises a proximal projection and a distal projection, and wherein the distal projection is positioned distally with respect to the proximal projection.

Example 25—The surgical instrument of Examples 17, 18, 19, 20, 21, 22, 23, or 24, wherein the coupling portion comprises a shoulder, and wherein the bar comprises a hook engaged with the shoulder.

Example 26—The surgical instrument of Examples 17, 18, 19, 20, 21, 22, 23, 24, or 25, wherein the plurality of layers comprises a first layer and a second layer, and wherein the cutting edge is defined on the first layer and not defined on the second layer.

Example 27—The surgical instrument of Examples 17, 18, 19, 20, 21, 22, 23, 24, 25, or 26, wherein the plurality of layers comprises a first layer and a second layer, and wherein the cutting edge is defined on the first layer and the second layer.

Example 28—The surgical instrument of Examples 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, or 27, wherein the plurality of layers comprises a first layer, a second layer, and an intermediate layer positioned intermediate the first layer and the second layer. The coupling portion comprises a first lateral recess, a second lateral recess, and a mounting tab. The first layer is mounted to the coupling portion in the first lateral recess, the second layer is mounted to the coupling portion in the second lateral recess, and the intermediate layer is attached to the mounting tab.

Example 29—A surgical stapler comprising a first jaw comprising a distal jaw end, a second jaw, a staple cartridge comprising a plurality of staples removably stored therein, and a firing member movable toward the distal jaw end during a firing stroke to eject the staples from the staple cartridge. The second jaw is movable relative to the first jaw to capture the tissue of a patient between the first jaw and the second jaw. The firing member comprises a coupling portion comprising a first cam configured to engage the first jaw and a second cam configured to engage the second jaw during the firing stroke and a bar attached to the coupling portion, wherein the bar comprises a cutting edge configured to cut the patient tissue during the firing stroke.

Example 30—A surgical instrument comprising a first jaw comprising a distal jaw end, a second jaw movable relative to the first jaw to capture the tissue of a patient between the first jaw and the second jaw, and a cutting member movable toward the distal jaw end during a cutting stroke. The cutting member comprises a coupling portion and a bar. The coupling portion comprises a first cam configured to engage the first jaw during the cutting stroke, a second cam configured to engage the second jaw during the cutting stroke, a first lateral recess, a second lateral recess, and a mounting tab. The bar comprises a first layer mounted to the coupling portion in the first lateral recess, a second layer mounted to the coupling portion in the second lateral recess, and an intermediate layer positioned intermediate the first layer and the second layer, wherein the intermediate layer is attached to the mounting tab.

Example 31—The surgical instrument of Example 30, wherein the surgical instrument further comprises a staple cartridge including staples removably stored therein, and wherein the cutting member is configured to eject the staples from the staple cartridge during the cutting stroke to staple the patient tissue.

Example 32—The surgical instrument of Examples 30 or 31, wherein the mounting tab extends distally with respect to the first lateral recess and the second lateral recess.

Example 33—The surgical instrument of Examples 30, 31, or 32, wherein the coupling portion comprises a cutting edge configured to cut the patient tissue.

Example 34—The surgical instrument of Examples 30, 31, 32, or 33, wherein the bar comprises a cutting edge configured to cut the patient tissue.

Example 35—A surgical instrument comprising a first jaw comprising a distal jaw end, a second jaw movable relative to the first jaw to capture the tissue of a patient between the first jaw and the second jaw, and a firing member movable toward the distal jaw end during a firing stroke. The firing member comprises a coupling portion comprising a lateral recess and a mounting tab and a bar comprising a first layer mounted to the coupling portion in the lateral recess and a second layer attached to the mounting tab.

Example 36—The surgical instrument of Example 35, wherein the surgical instrument further comprises a staple cartridge including staples removably stored therein, and wherein the firing member is configured to eject the staples from the staple cartridge during the firing stroke to staple the patient tissue.

Example 37—A surgical stapling instrument comprising a shaft, an end effector extending from the shaft, a firing assembly, a lock in the shaft, and a staple cartridge. The end effector comprises a first jaw comprises a distal jaw end and a second jaw movable relative to the first jaw between an open position and a closed position. The firing assembly is movable toward the distal jaw end during a firing stroke, and the firing assembly comprises a coupling portion configured to engage the first jaw and the second jaw during the firing stroke and a lockout bar comprising a distal lockout end, wherein the lockout bar is movable between a distal locked position and a proximal unlocked position. The lock in the shaft is engaged with the firing bar prior to the firing stroke when the lockout bar is in the distal locked position, and the lock is disengaged from the firing bar prior to the firing stroke when the lockout bar is in the proximal unlocked position. The staple cartridge is positionable in the first jaw and the staple cartridge comprises a cartridge body, a plurality of staples removably stored in the cartridge body, and a sled movable from a proximal unfired position and a distal fired position to eject the staples from the cartridge body during the firing stroke, wherein the sled is configured to push the lockout bar into the proximal unlocked position when the staple cartridge is loaded into the first jaw and the sled is in the proximal unfired position.

Example 38—The surgical stapling instrument of Example 37, wherein the coupling portion comprises an aperture, and wherein the distal lockout end extends through the aperture.

Example 39—The surgical stapling instrument of Examples 37 or 38, wherein the lockout bar is slidable within the firing bar.

Example 40—The surgical stapling instrument of Examples 37, 38, or 39, wherein the surgical stapling instrument further comprises a spring configured to bias the lockout bar into the distal locked position.

Example 41—The surgical stapling instrument of Examples 37, 38, 39, or 40, wherein the surgical stapling instrument further comprises a spring configured to bias said lock into engagement with the firing bar.

Example 42—The surgical stapling instrument of Example 41, wherein the lockout bar comprises a key configured to engage the lock and disengage the lock from the firing bar against the bias of the spring.

Example 43—The surgical stapling instrument of Examples 37, 38, 39, 40, 41, or 42, wherein the cartridge body comprises a detent configured to releasably hold the sled in the proximal unfired position when the sled engages the lockout bar.

Example 44—The surgical stapling instrument of Examples 37, 38, 39, 40, 41, 42, or 43, wherein the lockout bar travels with the firing bar during the firing stroke.

Example 45—The surgical stapling instrument of Example 44, wherein the firing bar is retractable after the firing stroke, and wherein the lockout bar travels with the firing bar when the firing bar is retracted.

Example 46—The surgical stapling instrument of Example 45, wherein the sled is not retracted with the firing bar and the lockout bar.

Example 47—The surgical stapling instrument of Example 46, wherein the lockout bar cannot be reset into its proximal unlocked position until the staple cartridge is removed from the first jaw and an unspent staple cartridge is positioned in the first jaw.

Example 48—A surgical stapling instrument comprising an end effector, a firing assembly, a lock, and a staple cartridge loadable into the end effector. The end effector comprises a first jaw comprising a distal jaw end and a second jaw movable relative to the first jaw between an open position and a closed position. The firing assembly is movable toward the distal jaw end during a firing stroke, and the firing assembly comprises a firing bar and a lockout bar, wherein the lockout bar is movable between a distal locked position and a proximal unlocked position relative to the firing bar. The lock is engaged with the firing bar prior to the firing stroke when the lockout bar is in the distal locked position, and the lock is disengaged from the firing bar prior to the firing stroke when the lockout bar is in the proximal unlocked position. The staple cartridge comprises a cartridge body, a plurality of staples removably stored in the cartridge body, and a sled movable from a proximal unfired position and a distal fired position to eject the staples from the cartridge body during the firing stroke, wherein the sled is configured to push the lockout bar into the proximal unlocked position when the staple cartridge is loaded into the end effector and the sled is in the proximal unfired position.

Example 49—A surgical stapling instrument comprising an end effector, a firing bar, a lock, and a staple cartridge loadable into the end effector. The end effector comprises a first jaw comprises a distal jaw end and a second jaw movable relative to the first jaw between an open position and a closed position. The firing bar is movable away from the distal jaw end between a distal unlocked position and a proximal unlocked position, and the firing bar is then movable toward the distal jaw end during a firing stroke. The lock is engaged with the firing bar when the firing bar is in the distal locked position to prevent the firing stroke, and the lock is disengaged from the firing bar when the firing bar is in the proximal unlocked position. The staple cartridge comprises a cartridge body, a plurality of staples removably stored in the cartridge body, and a sled movable from a proximal unfired position and a distal fired position to eject the staples from the cartridge body during the firing stroke, wherein the sled is configured to push the firing bar into the proximal unlocked position when the staple cartridge is loaded into the end effector and the sled is in the proximal unfired position.

Example 50—The surgical stapling instrument of Example 49, wherein the surgical stapling instrument further comprises a biasing member configured to bias the firing bar into the distal locked position.

Example 51—The surgical stapling instrument of Examples 49 or 50, wherein the surgical stapling instrument further comprises a biasing member configured to bias the lock into engagement with the firing bar.

Example 52—The surgical stapling instrument of Examples 49, 50, or 51, wherein the firing bar comprises a key configured to engage the lock and disengage the lock from the firing bar against the bias of the firing bar.

Example 53—The surgical stapling instrument of Examples 49, 50, 51, or 52, wherein the firing bar is retractable after the firing stroke, and wherein the sled is not retracted with the firing bar.

Example 54—The surgical stapling instrument of Example 53, wherein the firing bar cannot be reset into the proximal unlocked position until the staple cartridge is removed from the end effector and an unspent staple cartridge is loaded in the end effector.

Example 55—The surgical stapling instrument of Examples 49, 50, 51, 52, 53, or 54, wherein the cartridge body comprises a detent configured to releasably hold the sled in the proximal unfired position when the sled engages the firing bar to move the firing bar into the proximal unlocked position and permit the firing bar to move the sled through the firing stroke.

Example 56—The surgical stapling instrument of Examples 49, 50, 51, 52, 53, 54, or 55, wherein the surgical stapling instrument further comprises a shaft, wherein the end effector extends from the shaft, and wherein the lock is positioned in the shaft.

Example 57—A surgical stapling assembly comprising a cartridge jaw, a firing member, and a staple cartridge removably positionable in the cartridge jaw. The cartridge jaw comprises a proximal end, a distal end positioned opposite the proximal end, a bottom wall, a lateral side wall extending from the bottom wall, and a plurality of jaw windows defined in the lateral side wall. The firing member is movable toward the distal end during a firing stroke. The staple cartridge comprises a cartridge body, a plurality of cartridge windows defined in the cartridge body, wherein the cartridge windows are aligned with the jaw windows when the staple cartridge is positioned in the cartridge jaw, staples removably stored in the cartridge body, and a sled movable toward the distal end during the firing stroke to eject the staples from the cartridge body, wherein the progress of the sled during the firing stroke is observable through the cartridge windows and the jaw windows.

Example 58—The surgical stapling assembly of Example 57, wherein the sled comprises a datum observable through the cartridge windows and the jaw windows.

Example 59—The surgical stapling assembly of Example 58, wherein the sled is moved along a longitudinal axis during the firing stroke, and wherein the datum comprises a vertical line orthogonal to the longitudinal axis.

Example 60—The surgical stapling assembly of Examples 57, 58, or 59, wherein the plurality of jaw windows comprises a proximal jaw window and a distal jaw window, wherein the plurality of cartridge windows comprises a proximal cartridge window aligned with the proximal jaw window and a distal cartridge window aligned with the distal jaw window, wherein the sled is movable between a proximal unfired position and a distal fired position during the firing stroke, wherein the sled is observable through the proximal jaw window and the proximal cartridge window when the sled is in the proximal unfired position, and wherein the sled is observable through the distal jaw window and the distal cartridge window when the sled is in the distal fired position.

Example 61—The surgical stapling assembly of Example 60, wherein the plurality of jaw windows comprises an intermediate jaw window positioned intermediate the proximal jaw window and the distal jaw window, wherein the plurality of cartridge windows comprises an intermediate cartridge window positioned intermediate the proximal cartridge window and the distal cartridge window aligned with the intermediate jaw window, and wherein the sled is observable through the intermediate jaw window and the intermediate cartridge window during the firing stroke.

Example 62—The surgical stapling assembly of Examples 57, 58, 59, 60, or 61, wherein the jaw windows are positioned along a longitudinal jaw window axis, wherein the cartridge windows are positioned along a longitudinal cartridge window axis, and wherein the longitudinal jaw window axis is aligned with the longitudinal cartridge window axis when the staple cartridge is positioned in the cartridge jaw.

Example 63—The surgical stapling assembly of Examples 57, 58, 59, 60, 61, or 62, wherein the bottom wall comprises a longitudinal slot configured to receive the firing member during the firing stroke.

Example 64—The surgical stapling assembly of Example 63, wherein the sled is movable between a proximal unfired position and a distal fired position during the firing stroke, wherein the longitudinal slot comprises a proximal bottom window, and wherein the sled is observable through the proximal bottom window when the sled is in the proximal unfired position.

Example 65—The surgical stapling assembly of Examples 63 or 64, wherein the sled is movable between a proximal unfired position and a distal fired position during the firing stroke, wherein the longitudinal slot comprises a distal bottom window, and wherein the sled is observable through the distal bottom window when the sled is in the distal fired position.

Example 66—The surgical stapling assembly of Examples 63, 64, or 65, wherein the longitudinal slot comprises a plurality of bottom windows defined in the bottom wall, and wherein the progress of the sled during the firing stroke is observable through the bottom windows.

Example 67—The surgical stapling assembly of Example 66, wherein the longitudinal slot defines a longitudinal axis, and wherein the bottom windows are offset with respect to the longitudinal axis.

Example 68—The surgical stapling assembly of Example 67, wherein bottom windows are staggered on opposite sides of the longitudinal axis in an alternating manner.

Example 69—A surgical stapling assembly including a firing member, the surgical stapling assembly comprising a cartridge jaw and a staple cartridge positioned in the cartridge jaw. The cartridge jaw comprises a proximal end, a distal end positioned opposite the proximal end, a bottom portion, a lateral side portion extending from the bottom portion, and a plurality of jaw windows defined in the lateral side portion. The staple cartridge comprises a cartridge body comprising staple cavities, a plurality of cartridge windows defined in the cartridge body, wherein the cartridge windows are aligned with the jaw windows, staples removably stored in the staple cavities, and a sled movable toward the distal end by the firing member to eject the staples from the cartridge body, wherein the progress of the sled toward the distal end is observable through the cartridge windows and the jaw windows.

Example 70—A surgical stapling assembly comprising a cartridge jaw, a firing member, and a staple cartridge. The cartridge jaw comprises a proximal end, a distal end positioned opposite the proximal end, a bottom wall, lateral side walls extending from the bottom wall, and a longitudinal slot defined in the bottom wall, wherein the longitudinal slot comprises a plurality of jaw windows defined in the bottom wall. The firing member is movable toward the distal end through the longitudinal slot during a firing stroke. The staple cartridge is positionable between the lateral side walls in the cartridge jaw. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled movable toward the distal end during the firing stroke to eject the staples from the cartridge body, wherein the progress of the sled during the firing stroke is observable through the jaw windows.

Example 71—The surgical stapling assembly of Example 70, wherein the sled is movable between a proximal unfired position and a distal fired position during the firing stroke, wherein the jaw windows comprise a proximal bottom window, and wherein the sled is observable through the proximal bottom window when the sled is in the proximal unfired position.

Example 72—The surgical stapling assembly of Examples 70 or 71, wherein the sled is movable between a proximal unfired position and a distal fired position during the firing stroke, wherein the jaw windows comprise a distal bottom window, and wherein the sled is observable through the distal bottom window when the sled is in the distal fired position.

Example 73—The surgical stapling assembly of Examples 70, 71, or 72, wherein the longitudinal slot defines a longitudinal axis, and wherein the jaw windows are offset with respect to the longitudinal axis.

Example 74—A surgical stapling assembly comprising a cartridge jaw and a staple cartridge. The cartridge jaw comprises a proximal end, a distal end positioned opposite said proximal end, a bottom wall, lateral side walls extending from the bottom wall, and a longitudinal slot defined in the bottom wall, wherein the longitudinal slot comprises a plurality of jaw windows defined in the bottom wall. The staple cartridge is positioned between the lateral side walls in the cartridge jaw. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled movable toward the distal end during a firing stroke to eject the staples from the cartridge body, wherein the progress of the sled during the firing stroke is observable through the jaw windows.

Example 75—A surgical instrument comprising a shaft, an end effector comprising a staple cartridge, and a firing assembly. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled configured to eject the staples from the cartridge body during a staple firing stroke. The firing assembly is configured to apply a pushing force to the sled during the staple firing stroke. The firing assembly comprises a first portion, a second portion, wherein the second portion is displaceable relative to the first portion, and a pushing force lockout system at least partially positioned intermediate the first portion and the second portion, wherein the pushing force lockout system is configured to engage the shaft and stop the staple firing stroke if the pushing force exceeds a threshold.

Example 76—The surgical instrument of Example 75, wherein the surgical instrument further comprises a biasing member positioned intermediate the first portion and the second portion, and wherein the biasing member is configured to apply a biasing force to the second portion which opposes the pushing force.

Example 77—The surgical instrument of Example 76, wherein the threshold comprises a pre-selected difference between the pushing force and the biasing force.

Example 78—The surgical instrument of Example 77, wherein the pushing force lockout system comprises a lock mounted to the shaft, a spring, and an actuator rotatably mounted to the firing assembly. The lock is displaceable between an unlocked position and a locked position, and the lock is configured to prevent the firing assembly from performing the staple firing stroke when the lock is in the locked position. The spring is configured to bias the lock into the locked position. The second portion is configured to rotate the actuator toward the lock and displace the lock into the unlocked position when the threshold is exceeded.

Example 79—The surgical instrument of Example 78, wherein the actuator is rotatably mounted to the first portion and the lock is configured to engage the second portion.

Example 80—The surgical instrument of Examples 78 or 79, wherein the surgical instrument further comprises an actuator spring configured to bias the actuator out of engagement with the lock, wherein the second portion overcomes the actuator spring when the second portion is moved toward the first portion.

Example 81—The surgical instrument of Examples 75, 76, 77, 78, 79, or 80, wherein the staple cartridge comprises a replaceable staple cartridge.

Example 82—The surgical instrument of Examples 75, 76, 77, 78, 79, 80, or 81, wherein the staple cartridge comprises a spent cartridge lockout configured to block the firing assembly from performing the staple firing stroke if the staple cartridge has been at least partially spent.

Example 83—The surgical instrument of Examples 75, 76, 77, 78, 79, 80, 81, or 82, wherein the surgical instrument further comprises an electric motor configured to drive the firing assembly through the staple firing stroke.

Example 84—A surgical instrument comprising a frame, an end effector comprising a staple cartridge, a firing assembly, and a firing force lockout system. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled configured to eject the staples from the cartridge body during a firing stroke. The firing assembly is configured to apply a firing force to the sled during the firing stroke. The firing assembly comprises a first portion and a second portion, wherein the second portion is displaceable relative to the first portion. The firing force lockout system is configured to engage the frame and prevent the staple firing stroke if the firing force exceeds a threshold.

Example 85—The surgical instrument of Example 84, wherein the surgical instrument further comprises a biasing member positioned intermediate the first portion and the second portion, wherein the biasing member is configured to apply a biasing force to the second portion which opposes the firing force.

Example 86—The surgical instrument of Example 85, wherein the threshold comprises a pre-selected difference between the firing force and the biasing force.

Example 87—The surgical instrument of Example 86, wherein the firing force lockout system comprises a lock mounted to the frame, a spring, and an actuator rotatably mounted to the firing assembly. The lock is displaceable between an unlocked position and a locked position, and the lock is configured to prevent the firing assembly from performing the staple firing stroke when the lock is in the locked position. The spring is configured to bias the lock into the locked position. The second portion is configured to rotate the actuator toward the lock and displace the lock into the unlocked position when the threshold is exceeded.

Example 88—The surgical instrument of Example 87, wherein the actuator is rotatably mounted to the first portion and the lock is configured to engage the second portion.

Example 89—The surgical instrument of Examples 87 or 88, wherein the surgical instrument further comprises an actuator spring configured to bias the actuator out of engagement with the lock, and wherein the second portion overcomes the actuator spring when the second portion is moved toward the first portion.

Example 90—The surgical instrument of Examples 84, 85, 86, 87, 88, or 89, wherein the staple cartridge comprises a replaceable staple cartridge.

Example 91—The surgical instrument of Examples 84, 85, 86, 87, 88, 89, or 90, wherein the staple cartridge comprises a spent cartridge lockout configured to block the firing assembly from performing the staple firing stroke if the staple cartridge has been at least partially spent.

Example 92—A surgical instrument comprising an end effector comprising a staple cartridge, wherein the staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled configured to eject the staples from the cartridge body during a firing stroke. The surgical instrument further comprises a firing assembly configured to apply a firing force to the sled during the firing stroke and means for stopping the staple firing stroke if the firing force exceeds a threshold.

Example 93—The surgical instrument of Example 92, wherein the means is resettable.

Example 94—A surgical instrument comprising a firing assembly movable through a firing stroke, an end effector comprising a staple cartridge, and a firing force lockout system. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, a sled movable between a proximal unfired position and a distal fired position to eject the staples from the cartridge body during the firing stroke, and a spent cartridge lockout configured to block the firing assembly from performing the firing strong if the sled is not in the proximal unfired position at the initiation of the firing stroke. The firing force lockout system is configured to assist in preventing the firing assembly from performing the firing stroke when the firing assembly is blocked by the spent cartridge lockout.

Example 95—The surgical instrument of Example 94, wherein the firing assembly comprises a first portion and a second portion, and wherein the firing force lockout system is at least partially positioned intermediate the first portion and the second portion of the firing assembly.

Example 96—The surgical instrument of Example 95, wherein the second portion is movable relative to the first portion, and wherein the second portion is configured to deploy the firing force lockout system into a locked configuration when the second portion is moved toward the first portion.

Example 97—The surgical instrument of Example 96, wherein the surgical instrument further comprises a biasing member positioned intermediate the first portion and the second portion, and wherein the biasing member is configured to push the second portion away from the first portion.

Example 98—The surgical instrument of Example 97, wherein the firing force lockout system is biased into an unlocked configuration.

Example 99—The surgical instrument of Examples 94, 95, 96, 97, or 98, wherein the surgical instrument further comprises a frame, wherein the firing force lockout system is mounted to the firing assembly, and wherein the firing force lockout system is configured to engage the frame in response to the spent cartridge lockout blocking the firing assembly.

Example 100—The surgical instrument of Example 99, wherein the surgical instrument further comprises a longitudinal shaft, and wherein the frame is positioned within the longitudinal shaft.

Example 101—The surgical instrument of Examples 94, 95, 96, 97, 98, 99, or 100, wherein the surgical instrument further comprises an electric motor configured to move the firing assembly through the firing stroke.

Example 102—The surgical instrument of Example 101, wherein the firing force lockout system is deployable into a locked configuration when the firing assembly is blocked by the spent cartridge lockout, and wherein the electric motor is operable to retract the firing assembly to reset the firing force lockout system into an unlocked configuration.

Example 103—The surgical instrument of Examples 94, 95, 96, 97, 98, 99, 100, 101, or 102, wherein the cartridge body comprises a longitudinal slot configured to receive the firing assembly, and wherein the spent cartridge lockout comprises a metal clip. The metal clip comprises a mounting portion mounted to the cartridge body and a lock portion deflectable between a locked configuration and an unlocked configuration, wherein the lock portion extends into the longitudinal slot to block the firing assembly when the lock portion is in the locked configuration.

Example 104—The surgical instrument of Example 103, wherein the sled is configured to hold the lock portion in the unlocked configuration when the sled is in the proximal unfired position.

Example 105—The surgical instrument of Example 104, wherein the lock portion is biased toward the locked configuration, and wherein the sled is configured to release the lock portion when the sled is advanced distally during the firing stroke.

Example 106—The surgical instrument of Example 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, or 105, wherein the staple cartridge is a replaceable staple cartridge.

Example 107—The surgical instrument of Example 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, or 105, wherein the staple cartridge is not a replaceable staple cartridge.

Example 108—A surgical instrument comprising a firing assembly movable through a firing stroke, an end effector comprising a staple cartridge, and a firing lockout. The staple cartridge comprises a cartridge body, staple removably stored in the cartridge body, a sled movable between a proximal unfired position and a distal fired position to eject the staples from the cartridge body during the firing stroke, and a cartridge lockout configured to block the firing assembly if the sled is not in the proximal unfired position at the initiation of the firing stroke. The firing lockout is configured to prevent the firing assembly from performing the firing stroke when the firing assembly is blocked by the cartridge lockout.

Example 109—A surgical instrument comprising a shaft, a firing assembly movable through an actuation stroke, an end effector, and a firing lockout in the shaft. The end effector comprises a first jaw, a second jaw movable relative to the first jaw, wherein the firing assembly comprises a first cam configured to engage the first jaw and a second cam configured to engage the second jaw to control the position of the second jaw relative to the first jaw during the actuation stroke, and a staple cartridge. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, a sled movable between a proximal unfired position and a distal fired position to eject the staples from the cartridge body, and a cartridge lockout configured to block the firing assembly if the sled is not in the proximal unfired position at the beginning of the actuation stroke. The firing lockout is configured to block the firing assembly if the firing assembly is blocked by the cartridge lockout.

Example 110—A surgical instrument comprising an end effector and a firing assembly configured to transmit a firing load to the end effector during a firing stroke. The firing assembly comprises a first portion, a second portion, and a fuse portion, wherein the fuse portion is configured to transmit the firing load from the first portion to the second portion when the fuse portion is intact, wherein the fuse portion is configured to fail when the firing load exceeds a threshold, and wherein the first portion cannot transmit the firing load to the second portion once the fuse portion has failed.

Example 111—The surgical instrument of Example 110, wherein the fuse portion is resettable.

Example 112—The surgical instrument of Example 111, wherein the end effector comprises a distal end, wherein the firing assembly is advanced toward the distal end during the firing stroke, and wherein the firing assembly is advanced away from the distal end to reset the fuse portion.

Example 113—The surgical instrument of Examples 110, 111, or 112, wherein the first portion comprises a flexible first rod, wherein the second portion comprises a second rod, and wherein the flexible first rod is configured to bend and disengage from the second rod when the firing load exceeds the threshold.

Example 114—The surgical instrument of Example 113, wherein the flexible rod resiliently bends out of engagement with the second rod when the firing load exceeds the threshold, and wherein the flexible first rod is configured to snap back into engagement with the second rod when the flexible first rod is realigned with the second rod.

Example 115—The surgical instrument of Examples 113 or 114, wherein the firing assembly further comprises a collar, wherein the second rod is slidably positioned in the collar, wherein the flexible first rod is not positioned in the collar when the firing stroke is initiated, wherein the flexible first rod enters into the collar during the firing stroke, and wherein the collar prevents the flexible first rod from disengaging from the second rod.

Example 116—The surgical instrument of Example 113, 114, or 115, wherein the surgical instrument further comprises a frame, wherein the flexible first rod is configured to engage the frame and block the firing assembly from performing the firing stroke when the flexible first rod disengages from the second rod.

Example 117—The surgical instrument of Examples 113, 114, 115, or 116, wherein the surgical instrument further comprises a biasing member configured to bias the flexible first rod into engagement with the second rod.

Example 118—The surgical instrument of Examples 110, 111, 112, 113, 114, 115, 116, or 117, wherein the fuse portion comprises a first barb defined on the first portion and a second barb defined on the second portion engaged with the first barb, and wherein the first barb disengages from the second barb when the firing force exceeds the threshold.

Example 119—The surgical instrument of Examples 110, 111, 112, 113, 114, 115, 116, 117, or 118, wherein fuse portion comprises a first foot defined on the first portion and a second foot defined on the second portion engaged with the first foot, and wherein the first foot slips relative to the second foot when the firing force exceeds the threshold.

Example 120—The surgical instrument of Example 119, wherein the surgical instrument further comprises a frame, wherein said first portion comprises a biasing member engaged with said frame, and wherein said biasing member is configured to bias said first foot into engagement with said second foot.

Example 121—The surgical instrument of Examples 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, or 120, wherein the second portion comprises a plurality of layers, wherein the fuse portion comprises a proximal portion of the layers which splays outwardly when the firing force exceeds the threshold.

Example 122—The surgical instrument of Example 121, wherein the surgical instrument further comprises a frame, wherein the splayed layers are configured to engage the frame and block the firing assembly from performing the firing stroke when the firing load exceeds the threshold.

Example 123—The surgical instrument of Examples 121 or 122, wherein the layers resiliently splay outwardly when the firing load exceeds the threshold, and wherein the layers are configured to flex inwardly to reset the fuse portion when the firing assembly is retracted.

Example 124—The surgical instrument of Examples 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, or 122, wherein the fuse portion is not resettable.

Example 125—The surgical instrument of Example 124, wherein the fuse portion comprises a wall defined in the first portion, and wherein the wall is configured to break away from the first portion when the firing load exceeds the threshold.

Example 126—The surgical instrument of Examples 124 or 125, wherein the fuse portion comprises a series of collapsible walls arranged along a longitudinal axis in the first portion, and wherein the collapsible walls are configured to fail sequentially when the firing force exceeds the threshold.

Example 127—The surgical instrument of Examples 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, or 126, wherein the end effector comprises a staple cartridge.

Example 128—A surgical instrument comprising an end effector comprising a staple cartridge and a firing assembly. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled configured to eject the staples from the cartridge body. The firing assembly is configured to apply a firing load to the sled during a staple firing stroke. The firing assembly comprises a first portion, a second portion, and a fuse configured to transmit the firing load from the first portion to the second portion when the fuse is intact, wherein the fuse is configured to fail when the firing load exceeds a threshold, and wherein the firing assembly cannot transmit the firing stroke to the sled once the fuse has failed.

Example 129—A surgical instrument comprising an end effector comprising a staple cartridge and a firing assembly. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled configured to eject the staples from the cartridge body. The firing assembly is configured to apply a firing load to the sled during a staple firing stroke. The firing assembly comprises a fuse configured to transmit the firing load to the sled when the fuse is intact, wherein the fuse is configured to fail when the firing load exceeds a threshold, and wherein the firing assembly cannot transmit the firing load to the sled once the fuse has failed.

Example 130—A surgical instrument comprising an end effector comprising a staple cartridge and a firing assembly comprising a fuse. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled configured to eject the staples from the cartridge body. The fuse comprises an intact state, wherein the firing assembly is configured to transmit a firing load to the sled during a firing stroke when the fuse is in the intact state, a first failed state, wherein the firing assembly is configured to transmit a load to the sled when the fuse is in the first failed state, and a second failed state, wherein the firing assembly cannot transmit a load to the sled when the fuse is in the second failed state.

Example 131—The surgical instrument of Example 130, wherein the fuse is resettable from the first failed state to the intact state.

Example 132—The surgical instrument of Example 131, wherein the end effector comprises a distal end, and wherein the firing assembly is retractable away from the distal end to reset the fuse into the intact state.

Example 133—The surgical instrument of Examples 130, 131, or 132, wherein the fuse is resettable from the second failed state to the first failed state.

Example 134—The surgical instrument of Example 133, wherein the end effector comprises a distal end, and wherein the firing assembly is retractable away from the distal end to reset said fuse into said intact state.

Example 135—The surgical instrument of Example 130, wherein the fuse is not resettable from the first failed state to the intact state.

Example 136—The surgical instrument of Example 130, wherein the fuse is not resettable from the second failed state to the first failed state.

Example 137—The surgical instrument of Examples 130, 131, 132, 133, 134, 135, or 136, wherein the firing assembly can be used to finish the firing stroke in the first failed state of the fuse.

Example 138—The surgical instrument of Examples 130, 131, 132, 133, 134, 135, or 136, wherein the firing assembly cannot be used to finish the firing stroke in the first failed state of the fuse.

Example 139—The surgical instrument of Examples 130, 131, 132, 133, 134, 135, 136, 137, or 138, wherein the fuse is configured to stop the firing stroke in the second failed state.

Example 140—The surgical instrument of Example 139, wherein the surgical instrument further comprises a frame, wherein the fuse is configured to engage the frame to stop the firing stroke in the second failed state.

Example 141—The surgical instrument of Examples 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, or 140, wherein the firing assembly further comprises a first portion and a second portion, and wherein the fuse is positioned intermediate the first portion and the second portion.

Example 142—The surgical instrument of Example 141, wherein the second portion partially collapses relative to the first portion when the fuse is in the first failed state.

Example 143—The surgical instrument of Example 141, wherein the second portion completely collapses relative to the first portion when the fuse is in the second failed state.

Example 144—The surgical instrument of Examples 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, or 143, wherein the firing load is greater than the load.

Example 145—The surgical instrument of Examples 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, or 143, wherein the firing load is equal to the load.

Example 146—The surgical instrument of Examples 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, or 145, wherein the fuse comprises a biasing portion configured to bias the fuse into the intact state.

Example 147—The surgical instrument of Examples 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, or 146, wherein the biasing portion is configured to bias the fuse into the first failed state once the fuse has left the intact state.

Example 148—A surgical instrument comprising an electric motor, an end effector comprising a staple cartridge, and a firing assembly comprising a fuse. The staple cartridge comprises a cartridge body, staples removably stored in the cartridge body, and a sled configured to eject the staples from the cartridge body. The fuse comprises an intact state, wherein the fuse is configured to transmit a firing load from the electric motor to the sled during a firing stroke when the fuse is in the intact state, a slipped state, wherein the fuse is configured to transmit a load from the electric motor to the sled when the fuse is in the slipped state, and a failed state, wherein the fuse cannot transmit a load to the sled when the fuse is in the second failed state.

Example 149—A surgical instrument comprising an end effector comprising a staple cartridge, wherein the staple cartridge comprises a cartridge body including a distal end, staples removably stored in the cartridge body, and a sled configured to eject the staples from the cartridge body. The surgical instrument further comprises a firing assembly configured to apply a firing force to and advance the sled toward the distal end during a firing stroke and means for limiting the functionality of the firing assembly in a plurality of operating states if the firing force exceeds a threshold.

Example 150—A method for operating a surgical instrument comprising a firing assembly including a fuse, wherein the method comprises the steps of advancing the firing assembly to perform a staple firing stroke and apply a firing load to a staple cartridge assembly, stopping the firing assembly if the fuse in the firing assembly fails from an excessive firing load, and retracting the firing assembly to reset the fuse.

Example 151—The method of Example 150, wherein the method further comprises the step of completing the staple firing stroke after the retracting step.

Example 152—The method of Examples 150 or 151, wherein the method further comprises the step of retracting the firing assembly to an unfired position instead of completing the staple firing stroke.

Example 153—The method of Examples 150, 151, or 152, wherein the surgical instrument comprises an end effector, wherein the end effector comprises a missing staple cartridge lockout, and wherein the firing load becomes an excessive firing load when the firing assembly abuts the missing staple cartridge lockout

Example 154—The method of Examples 150, 151, 152, or 153, wherein the surgical instrument comprises an end effector, wherein the end effector comprises a spent staple cartridge lockout, and wherein the firing load becomes an excessive firing load when the firing assembly abuts the spent staple cartridge lockout.

Example 155—The method of Examples 150, 151, 152, 153, or 154, wherein the surgical instrument comprises a lockout configured to perform the stopping step.

Example 156—The method of Examples 150, 151, 152, 153, 154, or 155, wherein the method further comprises the steps of replacing the staple cartridge assembly with an unspent staple cartridge assembly and completing the staple firing stroke after the stopping step.

Example 157—A method for operating a surgical instrument comprising a firing assembly including a fuse, wherein the method comprises the steps of advancing the firing assembly within a staple cartridge assembly to perform a staple firing stroke and apply a firing load to the staple cartridge assembly, completing the staple firing stroke if the fuse in the firing assembly enters into a first failed state, and stopping the staple firing stroke if the fuse in the firing assembly enters into a second failed state after entering into the first failed state.

Example 158—The method of Example 157, wherein the method further comprises the step of resetting the fuse after the stopping step.

Example 159—The method of Example 158, wherein the resetting step comprises the step of retracting the firing assembly.

Example 160—The method of Examples 157, 158, or 159, wherein the completing step comprises the steps of retracting the firing assembly and then advancing the firing assembly.

Example 161—The method of Examples 157, 158, 159, or 160, wherein the fuse enters into the first failed state when the firing load exceeds a first force threshold, and wherein the fuse enters into the second failed state when the firing load exceeds a second force threshold.

Example 162—The method of Example 161, wherein the first force threshold is different than the second force threshold.

Example 163—The method of Examples 161 or 162, wherein the second force threshold is higher than the first force threshold.

Example 164—The method of Examples 157, 158, 159, 160, 161, 162, or 163, wherein the surgical instrument comprises a lockout configured to perform the stopping step.

Example 165—The method of Examples 157, 158, 159, 160, 161, 162, 163, or 164, wherein the method further comprises the steps of replacing the staple cartridge assembly with an unspent staple cartridge assembly and completing the staple firing stroke after the stopping step.

Example 166—The method of Examples 157, 158, 159, 160, 161, 162, 163, 164, or 165, wherein the method further comprises the step of resetting the fuse from the second failed state to the first failed state after the stopping step.

Example 167—The method of Examples 157, 158, 159, 160, 161, 162, 163, 164, 165, or 166, wherein the method further comprises the step of resetting the fuse from second failed state to an unfailed state after the stopping step.

Example 168—A method for operating a surgical instrument comprising a firing assembly including a fuse, wherein the method comprises the steps of advancing the firing assembly to perform a staple firing stroke and apply a firing load to a staple cartridge assembly, stopping the firing assembly if the fuse in the firing assembly changes state, and resetting the fuse to an unfailed state.

Example 169—A surgical stapling system comprising a staple cartridge attachment portion, a first staple cartridge configured to be operably attached to the staple cartridge attachment portion, wherein the first staple cartridge comprises a plurality of first staples comprising first staple legs, and a second staple cartridge configured to be operably attached to the staple cartridge attachment portion, wherein the second staple cartridge comprises a plurality of second staples comprising second staple legs, and wherein the first staples and the second staples are different. The surgical stapling system further comprises an anvil comprising a tissue-engaging surface and a plurality of forming pockets defined in the tissue-engaging surface. Each forming pocket comprises a first landing zone configured to receive a leg of a first staple and a second landing zone configured to receive a leg of a second staple.

Example 170—The surgical stapling system of Example 169, wherein the anvil comprises an anvil slot defining an anvil longitudinal axis, and wherein the first staple cartridge comprises a cartridge slot defining a first longitudinal cartridge axis which is aligned with the anvil longitudinal axis when the first staple cartridge is operably attached to the staple cartridge attachment portion and a longitudinal row of the first staples, wherein each first staple leg comprises a first staple tip, wherein the first staple tips define a first longitudinal staple axis, wherein the first longitudinal staple axis is a first distance from the first longitudinal cartridge axis. The second staple cartridge comprises a cartridge slot defining a second longitudinal cartridge axis which is aligned with the anvil longitudinal axis when the second staple cartridge is operably attached to the staple cartridge attachment portion and a longitudinal row of the second staples, wherein each second staple leg comprises a second staple tip, wherein the second staple tips define a second longitudinal staple axis, wherein the second longitudinal staple axis is a second distance from the second longitudinal cartridge axis, and wherein the first distance is different than the second distance.

Example 171—The surgical stapling system of Examples 169 or 170, wherein the first staples comprise wire staples and wherein the second staples comprise flat formed staples.

Example 172—The surgical stapling system of Examples 169, 170, or 171, wherein the first staples are configured to be formed into a planar configuration, and wherein the second staples are configured to be formed into a nonplanar configuration.

Example 173—The surgical stapling system of Examples 169, 170, 171, or 172, wherein the first landing zone of each forming pocket comprises a first pocket feature configured to take control of forming a first staple leg into a first configuration.

Example 174—The surgical stapling system of Example 173, wherein the first pocket feature comprises a groove.

Example 175—The surgical stapling system of Example 174, wherein each first staple comprises a first thickness, and wherein the groove comprises an overall width that is greater than the first thickness.

Example 176—The surgical stapling system of Example 175, wherein each second staple comprises a second thickness that is greater than the first thickness, and wherein the second thickness is greater than the overall width of the groove.

Example 177—The surgical stapling system of Examples 169, 170, 171, 172, 173, 174, 175, 176, or 177, wherein the forming pockets are arranged in a plurality of forming pocket arrangements, wherein the anvil defines a datum plane, wherein the tissue-engaging surface comprises a plurality of tissue-facing surfaces each comprising a forming pocket arrangement, and wherein the tissue-facing surfaces are individually angled with respect to the datum plane.

Example 178—The surgical stapling system of Example 177, wherein the anvil comprises a proximal end and a distal end, and wherein the angle of each tissue-facing surface increases progressively from the proximal end to the distal end.

Example 179—A surgical fastening system comprising a fastener cartridge attachment portion, a first fastener cartridge configured to be installed into the fastener cartridge attachment portion, wherein the first fastener cartridge comprises a plurality of first fasteners comprising first fastener legs, and a second fastener cartridge configured to be installed into to the fastener cartridge attachment portion, wherein the second fastener cartridge comprises a plurality of second fasteners comprising second fastener legs, and wherein the first fasteners and the second fasteners are different. The surgical fastening system further comprises an anvil comprising a tissue-engaging surface and a plurality of forming pockets defined in the tissue-engaging surface. Each forming pocket comprises a first target zone configured to receive a leg of a first fastener and form the leg of the first fastener into a first configuration and a second target zone configured to receive a leg of a second fastener and form the leg of the second fastener into a second configuration, wherein the first configuration and the second configuration are different.

Example 180—The surgical fastening system of Example 179, wherein the first configuration comprises a planar configuration and the second configuration comprises a nonplanar configuration.

Example 181—The surgical fastening system of Examples 179 or 180, wherein the anvil comprises an anvil slot defining an anvil longitudinal axis, and wherein the first fastener cartridge comprises a cartridge slot defining a first longitudinal cartridge axis which is aligned with the anvil longitudinal axis when the first fastener cartridge is operably attached to the fastener cartridge attachment portion and a longitudinal row of the first fasteners, wherein each first fastener leg comprises a first fastener tip, wherein the first fastener tips define a first longitudinal fastener axis, wherein the first longitudinal fastener axis is a first distance from the first longitudinal cartridge axis. The second fastener cartridge comprises a cartridge slot defining a second longitudinal cartridge axis which is aligned with the anvil longitudinal axis when the second fastener cartridge is operably attached to the fastener cartridge attachment portion and a longitudinal row of the second fasteners, wherein each second fastener leg comprises a second fastener tip, wherein the second fastener tips define a second longitudinal fastener axis, wherein the second longitudinal fastener axis is a second distance from the second longitudinal cartridge axis, and wherein the first distance is different than the second distance.

Example 182—The surgical fastening system of Examples 179, 180, or 181, wherein the first fasteners comprise wire fasteners and wherein the second fasteners comprise flat formed fasteners.

Example 183—The surgical fastening system of Examples 179, 180, 181, or 182, wherein the first target zone of each forming pocket comprises a first pocket feature configured to take control of forming a first fastener leg into the first configuration.

Example 184—The surgical fastening system of Example 183, wherein the first pocket feature comprises a groove.

Example 185—The surgical fastening system of Example 184, wherein each first fastener comprises a first thickness, and wherein the groove comprises an overall width that is greater than the first thickness.

Example 186—The surgical fastening system of Example 185, wherein each second fastener comprises a second thickness that is greater than the first thickness, and wherein the second thickness is greater than the overall width of the groove.

Example 187—A surgical stapling system comprising a staple cartridge attachment portion, a first staple cartridge configured to be operably attached to the staple cartridge attachment portion, wherein the first staple cartridge comprises a plurality of first staples comprising first staple legs, and a second staple cartridge configured to be operably attached to the staple cartridge attachment portion, wherein the second staple cartridge comprises a plurality of second staples comprising second staple legs, and wherein the first staples and the second staples are different. The surgical stapling system further comprising an anvil comprising a tissue-engaging surface and a plurality of forming pockets defined in the tissue-engaging surface. Each forming pocket comprises a first landing zone configured to receive a leg of a first staple, wherein the first staples are configured to be formed along a first path and a second landing zone configured to receive a leg of a second staple, wherein the second staples are configured to be formed along a second path, and wherein the first path and the second path are different.

Example 188—The surgical stapling system of Example 187, wherein the anvil comprises an anvil slot defining an anvil longitudinal axis, and wherein the first staple cartridge comprises a cartridge slot defining a first longitudinal cartridge axis which is aligned with the anvil longitudinal axis when the first staple cartridge is operably attached to the staple cartridge attachment portion and a longitudinal row of the first staples, wherein each first staple leg comprises a first staple tip, wherein the first staple tips define a first longitudinal staple axis, wherein the first longitudinal staple axis is a first distance from the first longitudinal cartridge axis. The second staple cartridge comprises a cartridge slot defining a second longitudinal cartridge axis which is aligned with the anvil longitudinal axis when the second staple cartridge is operably attached to the staple cartridge attachment portion and a longitudinal row of the second staples, wherein each second staple leg comprises a second staple tip, wherein the second staple tips define a second longitudinal staple axis, wherein the second longitudinal staple axis is a second distance from the second longitudinal cartridge axis, and wherein the first distance is different than the second distance.

Example 189—The surgical stapling system of Examples 187 or 188, wherein the first staples comprise planar staples.

Example 190—The surgical stapling system of Examples 187 or 188, wherein the first staples comprise non-planar staples.

Many of the surgical instrument systems described herein are motivated by an electric motor; however, the surgical instrument systems described herein can be motivated in any suitable manner. In various instances, the surgical instrument systems described herein can be motivated by a manually-operated trigger, for example. In certain instances, the motors disclosed herein may comprise a portion or portions of a robotically controlled system. Moreover, any of the end effectors and/or tool assemblies disclosed herein can be utilized with a robotic surgical instrument system. U.S. patent application Ser. No. 13/118,241, entitled SURGICAL STAPLING INSTRUMENTS WITH ROTATABLE STAPLE DEPLOYMENT ARRANGEMENTS, now U.S. Pat. No. 9,072,535, for example, discloses several examples of a robotic surgical instrument system in greater detail.

The surgical instrument systems described herein have been described in connection with the deployment and deformation of staples; however, the embodiments described herein are not so limited. Various embodiments are envisioned which deploy fasteners other than staples, such as clamps or tacks, for example. Moreover, various embodiments are envisioned which utilize any suitable means for sealing tissue. For instance, an end effector in accordance with various embodiments can comprise electrodes configured to heat and seal the tissue. Also, for instance, an end effector in accordance with certain embodiments can apply vibrational energy to seal the tissue.

The entire disclosures of:

-   -   U.S. Pat. No. 5,403,312, entitled ELECTROSURGICAL HEMOSTATIC         DEVICE, which issued on Apr. 4, 1995;     -   U.S. Pat. No. 7,000,818, entitled SURGICAL STAPLING INSTRUMENT         HAVING SEPARATE DISTINCT CLOSING AND FIRING SYSTEMS, which         issued on Feb. 21, 2006;     -   U.S. Pat. No. 7,422,139, entitled MOTOR-DRIVEN SURGICAL CUTTING         AND FASTENING INSTRUMENT WITH TACTILE POSITION FEEDBACK, which         issued on Sep. 9, 2008;     -   U.S. Pat. No. 7,464,849, entitled ELECTRO-MECHANICAL SURGICAL         INSTRUMENT WITH CLOSURE SYSTEM AND ANVIL ALIGNMENT COMPONENTS,         which issued on Dec. 16, 2008;     -   U.S. Pat. No. 7,670,334, entitled SURGICAL INSTRUMENT HAVING AN         ARTICULATING END EFFECTOR, which issued on Mar. 2, 2010;     -   U.S. Pat. No. 7,753,245, entitled SURGICAL STAPLING INSTRUMENTS,         which issued on Jul. 13, 2010;     -   U.S. Pat. No. 8,393,514, entitled SELECTIVELY ORIENTABLE         IMPLANTABLE FASTENER CARTRIDGE, which issued on Mar. 12, 2013;     -   U.S. patent application Ser. No. 11/343,803, entitled SURGICAL         INSTRUMENT HAVING RECORDING CAPABILITIES, now U.S. Pat. No.         7,845,537;     -   U.S. patent application Ser. No. 12/031,573, entitled SURGICAL         CUTTING AND FASTENING INSTRUMENT HAVING RF ELECTRODES, filed         Feb. 14, 2008;     -   U.S. patent application Ser. No. 12/031,873, entitled END         EFFECTORS FOR A SURGICAL CUTTING AND STAPLING INSTRUMENT, filed         Feb. 15, 2008, now U.S. Pat. No. 7,980,443;     -   U.S. patent application Ser. No. 12/235,782, entitled         MOTOR-DRIVEN SURGICAL CUTTING INSTRUMENT, now U.S. Pat. No.         8,210,411;     -   U.S. patent application Ser. No. 12/249,117, entitled POWERED         SURGICAL CUTTING AND STAPLING APPARATUS WITH MANUALLY         RETRACTABLE FIRING SYSTEM, now U.S. Pat. No. 8,608,045;     -   U.S. patent application Ser. No. 12/647,100, entitled         MOTOR-DRIVEN SURGICAL CUTTING INSTRUMENT WITH ELECTRIC ACTUATOR         DIRECTIONAL CONTROL ASSEMBLY, filed Dec. 24, 2009, now U.S. Pat.         No. 8,220,688;     -   U.S. patent application Ser. No. 12/893,461, entitled STAPLE         CARTRIDGE, filed Sep. 29, 2012, now U.S. Pat. No. 8,733,613;     -   U.S. patent application Ser. No. 13/036,647, entitled SURGICAL         STAPLING INSTRUMENT, filed Feb. 28, 2011, now U.S. Pat. No.         8,561,870;     -   U.S. patent application Ser. No. 13/118,241, entitled SURGICAL         STAPLING INSTRUMENTS WITH ROTATABLE STAPLE DEPLOYMENT         ARRANGEMENTS, now U.S. Pat. No. 9,072,535;     -   U.S. patent application Ser. No. 13/524,049, entitled         ARTICULATABLE SURGICAL INSTRUMENT COMPRISING A FIRING DRIVE,         filed on Jun. 15, 2012, now U.S. Pat. No. 9,101,358;     -   U.S. patent application Ser. No. 13/800,025, entitled STAPLE         CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, filed on Mar. 13,         2013, now U.S. Pat. No. 9,345,481;     -   U.S. patent application Ser. No. 13/800,067, entitled STAPLE         CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, filed on Mar. 13,         2013, now U.S. Patent Application Publication No. 2014/0263552;     -   U.S. Patent Application Publication No. 2007/0175955, entitled         SURGICAL CUTTING AND FASTENING INSTRUMENT WITH CLOSURE TRIGGER         LOCKING MECHANISM, filed Jan. 31, 2006; and     -   U.S. Patent Application Publication No. 2010/0264194, entitled         SURGICAL STAPLING INSTRUMENT WITH AN ARTICULATABLE END EFFECTOR,         filed Apr. 22, 2010, now U.S. Pat. No. 8,308,040, are hereby         incorporated by reference herein.

Although various devices have been described herein in connection with certain embodiments, modifications and variations to those embodiments may be implemented. Particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, the particular features, structures, or characteristics illustrated or described in connection with one embodiment may be combined in whole or in part, with the features, structures or characteristics of one ore more other embodiments without limitation. Also, where materials are disclosed for certain components, other materials may be used. Furthermore, according to various embodiments, a single component may be replaced by multiple components, and multiple components may be replaced by a single component, to perform a given function or functions. The foregoing description and following claims are intended to cover all such modification and variations.

The devices disclosed herein can be designed to be disposed of after a single use, or they can be designed to be used multiple times. In either case, however, a device can be reconditioned for reuse after at least one use. Reconditioning can include any combination of the steps including, but not limited to, the disassembly of the device, followed by cleaning or replacement of particular pieces of the device, and subsequent reassembly of the device. In particular, a reconditioning facility and/or surgical team can disassemble a device and, after cleaning and/or replacing particular parts of the device, the device can be reassembled for subsequent use. Those skilled in the art will appreciate that reconditioning of a device can utilize a variety of techniques for disassembly, cleaning/replacement, and reassembly. Use of such techniques, and the resulting reconditioned device, are all within the scope of the present application.

The devices disclosed herein may be processed before surgery. First, a new or used instrument may be obtained and, when necessary, cleaned. The instrument may then be sterilized. In one sterilization technique, the instrument is placed in a closed and sealed container, such as a plastic or TYVEK bag. The container and instrument may then be placed in a field of radiation that can penetrate the container, such as gamma radiation, x-rays, and/or high-energy electrons. The radiation may kill bacteria on the instrument and in the container. The sterilized instrument may then be stored in the sterile container. The sealed container may keep the instrument sterile until it is opened in a medical facility. A device may also be sterilized using any other technique known in the art, including but not limited to beta radiation, gamma radiation, ethylene oxide, plasma peroxide, and/or steam.

While this invention has been described as having exemplary designs, the present invention may be further modified within the spirit and scope of the disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles.

Any patent, publication, or other disclosure material, in whole or in part, that is said to be incorporated by reference herein is incorporated herein only to the extent that the incorporated materials do not conflict with existing definitions, statements, or other disclosure material set forth in this disclosure. As such, and to the extent necessary, the disclosure as explicitly set forth herein supersedes any conflicting material incorporated herein by reference. Any material, or portion thereof, that is said to be incorporated by reference herein, but which conflicts with existing definitions, statements, or other disclosure material set forth herein will only be incorporated to the extent that no conflict arises between that incorporated material and the existing disclosure material. 

What is claimed is:
 1. A surgical stapling instrument, comprising: a handle comprising a battery mount; a shaft extending from said handle, wherein said shaft comprises: a proximal end portion; a distal end portion; and a necked-down intermediate portion extending between said proximal end portion and said distal end portion, wherein said necked-down intermediate portion comprises a width that is narrower than the width of said proximal end portion and the width of said distal end portion; an end effector comprising a cartridge jaw and an anvil jaw; an articulation joint rotatably connecting said end effector to said distal end portion of said shaft; a replaceable staple cartridge comprising staples removably stored therein, wherein said replaceable staple cartridge is seatable in said cartridge jaw; a drive system, comprising: an electric motor; a control circuit in communication with said electric motor; and a proximal translatable firing member driveable by said electric motor during a firing stroke to eject said staples from said staple cartridge; a distal translatable firing member; and a fuse connecting said proximal translatable firing member and said distal translatable firing member, wherein said fuse translates with said proximal translatable firing member and said distal translatable firing member during said firing stroke, and wherein said fuse translates within said necked-down intermediate portion of said shaft; and a battery pack removably attachable to said battery mount.
 2. A surgical stapling instrument, comprising: a housing; a shaft extending from said housing, wherein said shaft comprises: a proximal end portion; a distal end portion; and a necked-down intermediate portion extending between said proximal end portion and said distal end portion, wherein said necked-down intermediate portion comprises a width that is narrower than the width of said proximal end portion and the width of said distal end portion; an end effector comprising a cartridge jaw and an anvil jaw; an articulation joint rotatably connecting said end effector to said distal end portion of said shaft; a replaceable staple cartridge comprising staples removably stored therein, wherein said replaceable staple cartridge is seatable in said cartridge jaw; and a drive system, comprising: an electric motor; a control circuit in communication with said electric motor; and a proximal translatable firing member driveable by said electric motor during a firing stroke to eject said staples from said staple cartridge; a distal translatable firing member; and a fuse connecting said proximal translatable firing member and said distal translatable firing member, wherein said fuse translates with said proximal translatable firing member and said distal translatable firing member during said firing stroke, and wherein said fuse translates within said necked-down intermediate portion of said shaft.
 3. The surgical stapling instrument of claim 1, wherein the fuse comprises a resettable fuse.
 4. The surgical stapling instrument of claim 1, wherein the fuse comprises a non-resettable fuse.
 5. The surgical stapling instrument of claim 1, wherein: the fuse comprises a first fuse and a second fuse, the first fuse is configured to fail at a first force threshold, the second fuse is configured to fail at a second force threshold, and the first force threshold equals the second force threshold.
 6. The surgical stapling instrument of claim 5, wherein the second fuse is positioned proximally of the first fuse.
 7. The surgical stapling instrument of claim 1, wherein: the fuse comprises a first fuse and a second fuse, the first fuse is configured to fail at a first force threshold, the second fuse is configured to fail at a second force threshold, and the first force threshold is less than the second force threshold.
 8. The surgical stapling instrument of claim 7, wherein the second fuse is positioned proximally of the first fuse.
 9. The surgical stapling instrument of claim 1, further comprising a lockout configured to prevent distal movement of the firing member if the replaceable staple cartridge is not seated in said cartridge jaw.
 10. The surgical stapling instrument of claim 2, wherein the fuse comprises a resettable fuse.
 11. The surgical stapling instrument of claim 2, wherein the fuse comprises a non-resettable fuse.
 12. The surgical stapling instrument of claim 2, wherein: the fuse comprises a first fuse and a second fuse, the first fuse is configured to fail at a first force threshold, the second fuse is configured to fail at a second force threshold, and the first force threshold equals the second force threshold.
 13. The surgical stapling instrument of claim 12, wherein the second fuse is positioned proximally of the first fuse.
 14. The surgical stapling instrument of claim 2, wherein: the fuse comprises a first fuse and a second fuse, the first fuse is configured to fail at a first force threshold, the second fuse is configured to fail at a second force threshold, and the first force threshold is less than the second force threshold.
 15. The surgical stapling instrument of claim 14, wherein the second fuse is positioned proximally of the first fuse.
 16. The surgical stapling instrument of claim 2, further comprising a lockout configured to prevent distal movement of the firing member if the replaceable staple cartridge is not seated in said cartridge jaw. 